Only the 3gb is available, the 6gb is £100 more is it still a good swap? The FPS videos showing the 1060 3gb always higher FPS even on highest settings

The 3GB model will still be faster than a 970 but you may be limiting yourself to play at slightly lower settings than you could, and that's because you'll be replacing a 4GB (or 3.5+0.5GB) card for one with 3GB.

Here's the VRAM usage of several games:

DIRT 4: https://www.hardocp.com/article/2017/08/08/dirt_4_real_gameplay_video_card_performance_review/12

Need for Speed Payback: https://www.hardocp.com/article/2017/11/20/need_for_speed_payback_video_card_performance_review/10

Wolfenstein II: The New Colossus: https://www.hardocp.com/article/2017/11/13/wolfenstein_ii_new_colossus_performance_review/11

Impressive, though price is quite staggering.

This probably also means that Nvidia will bump up prices across the board for consumer cards... Thanks AMD Oh well, no competition means my next card will most likely be a GTX2080.

Not sure if rumor, but bechmarks are out and this is only 20%-30% better than a 1080ti in games. Is that really worth it for like almost 4 times the price?

It isn't a gaming card.
It is actually pretty cheap, when you consider that it has decent FP64 compute.
12GB of HBM with 652.8 GB/s of bandwidth is a huge plus point.
Throw in those Tensor cores, and you have one justifiable purchase.

The card is not worth its price tag if the owner just wants to play games.

I jumped onto Polaris as I got tired of waiting for Vega.... And just couldn't stand dealing with Cedar.
Hoping Navi is enough of a jump over Polaris to warrant a purchase... As Vega wasn't it.
Otherwise I might actually do the unthinkable. Make a wander over to the green side. (Something I haven't done in years.)

Still, we should get Navi in about 6-9 months, not to much longer to wait with only a Polaris based card.

There is also a few things being floated around that AMD may take a Threadripper approach with Navi, where AMD uses it "fabric" to stitch together a heap of smaller, cheaper to manufacture chips... Which could mean some big things as far as price/performance is concerned and should result in less re-badging of old crap.

"Worth" is all relative. There is likely gamers out there who can justify the purchase price of these.

This is great for mining bitcoins, IJS.

To break the bad news to you Navi probably isn't until 2019. What we're most likely going to get in 2018 is Vega 20 which is Vega 10 ported to 7nm ... 

Or. We might not.

If we look at how AMD has released GPU's since GCN first came onto the scene... AMD has often just re-badged/re-released GPU's and sprinkled a couple new GPU's on top.

But looking at the roadmaps, the leaks... Seems we are getting Navi around August next year.
And to be fair... There are several people on this forum who once tried to convince me we wouldn't be getting Vega this year at all, that it would drop next year... ;)

I tend to be right more often than I am wrong about these things. :P

The only thing AMD has promised is that they'll roll out Navi before 2020 so I doubt they were that confident in bringing out Navi to the market before 2019 otherwise Vega 20 wouldn't be in their plans for next year ... 

AMD has dropped the ball big time by not promoting their own vendor specific enhancements and they haven't been doing a good job on capitalizing their advantage in the console market or DX12 adoption ...