PS VR and OR seem to be attracting the same audience. So if PS VR is a gimmick, OR is one too right. People who have used PS VR have said that its almost as good as OR and has its own good looking exclusives like RIGS so perhaps its not really for casual games.

Looking at your favourite franchises there is even more reason for you to be excited as GT Sport and Project Cars have already been confirmed to support VR.

You're too late, since VR is already successful...

So what? I play videogames since the late 80s and i'm very interested in PS VR AND HTC Vive.

Could come true. Could also be 1:1.

Where you heard that? From my (limited) knowledge of PSVR, it will be PS4 only device.

I really cannot see Playstation VR releasing for anything more than $299/£249, because that's the sweet spot and the components to make that headset aren't really that expensive now.

Oculus is a 4K display, PSVR is 1920X1080, both are 120FPS, so the display on PSVR is substantially cheaper to make, the bandwidth for the connections is much less demanding on hardware.
The volume of production is going to be higher on PSVR, because of the install bases involved in each unit.

As for the games, well with VR it's not just about the games, but Sony does have RIGS, which is a PSVR exclusive, plenty of other games are going to be enhanced through VR, like GT: Sport.
I'm sure there are plenty of other games that Sony's studios are working on to support the platform with.

The cost of entry is going to substantially lower on PSVR and Playstation is generally accepted by the masses as THE console, the place to play video games and that console market doesn't consider the PC. Oculus seems to be the more niche device or maybe more for the technical minded area of the market, possibly for more imaging related tasks, than gaming.

I think saying that PSVR will only get three quarters of the market is being way too conservative, I think it's more likely going to be a 90/10 split in favor of Playstation VR. Now how big of an amount of sales that means in general is difficult to say, but I would be shocked if 5% of the PS4 install base won't buy VR, I think PS4 will easily hit 57-60M by the end of 2016, so 2.85M-3M isn't unrealistic, Oculus maybe 285K-300K, though I think even that figure for Oculus is being generous. I could even end being half those numbers for Oculus.

I don't really know if the displays are THAT far apart on cost. The Rift uses a pair of 1200X1080 pentile displays that run at 90 hz while PSVR uses a single 1920X1080 RGB display that runs at 120 hz.

PSVR will still likely be a lot cheaper since Sony likely didn't have to develop and make each part specifically for VR the way Oculus did.

Actually, Oculus is 2160 x 1200 with what still appears to be PenTile display (so 1 Red and 1 Blue subpixels for every 2 Green in diamond pattern) @90Hz, PSVR is full RGB (@120Hz), which is why some people say it looks better than OR.

Only VR (that I'm aware of) that is in 4K range is StarVR (5120x1440), which is close to amount of pixels of 4K UHD.

I'm sure I'd read somewhere about Rift being 4K, still it's a big difference in component costs. Not only is the panel more than double the resolution, but the connections are going to require higher bandwidth for data transfer.

Sony had actually engineered the parts they use for their VR, Sony are actually a hardware company, more so than Oculus, which was a start up company not that long ago. Still PSVR will likely be produced in higher volumes, which would definitely reduce the costs significantly.

1) estimated price of a new pc + OR => 1600$,  estimated (highest) cost for PS4 + PS VR = 850$.  So its about half the cost of entry to get a VR ready system.

It all depends on what gamers will consider a VR ready system. 
Comparing GTX 970 (more than 1 year old) to PS4 (more than 2 years old) both are VR ready? Without VR controllers for both Oculus and Sony.

2) Nvidia estimates there are nearly three times as many VR-capable PS4 consoles as there are VR-capable PCs.

PS4 has a lower standard compared to PC, that's why there is such a difference. If were talking about VR capable maybe cardboard could join with a cheap smartphone?  

3) SuperData Research, find console players are willing to spend more money on VR than their PC playing counterparts (marketing research).

400 max that's not enough. Personally believe PC gamers are more passionate about VR, know more about tech, some are DIY-ing their own headsets, already own a DK1 or DK2, are more aware of specs, framerate etc. 

4) in order for that critical mass adoption, all the guesswork needs to be removed. Confusing system specs and competing products certainly won’t drive VR adoption forward on PC.

VR is still in it's infancy. Sony is aiming for a long lifecycle. We don't need a PS4 and PSVR that will keep the  status quo until 2020. Bad for hardware innovation. 100 VR games for PSVR is really nice for VR in general, because in  a small market most devs would want to go multiplatform. Choice and competition will drive VR. PC + Console + Smartphone. 

Also PC has Nvidia VR Ready, Oculus Ready, SteamVR Ready it's really not that hard, right?

Do you guys agree?

Will Sonys PS VR sell more than 3 times the amount the Oculus Rift does in 2016?

They should, but how much will they sell in 2018 when Oculus is moving into a second generation with eye-tracking? Remeber they've been making yearly updates on hardware. It will slow-down but not as much as with Sony's hardware since it depends on PS4 (and you don't want to replace a succesful console).  

Vive seems like the best/most complete/expensive VR solution this year, that nobody talks about.

If people spend 600$ you better believe it they expect it to last until 2020.

Asking people to spend that much and have it last less than 4years?