LOL how could that hurt sales?  Either way you are wrong because they are clearly already doing this.

What they are doing currently is minimal.  There is no blow you away level graphic difference (like Bayonetta last gen as an example) in any of the current 3rd party situations.  The hurting of sales comes from "why buy this version when the other version is better" concept.  Some people, who don't have both consoles, won't buy the worse version strictly because it is noticably worse.  Companies don't deliberately shoot themselves in the foot.

who is to say that the PS4 will remain the lead platform.  I remember during the PS3/360 era when the 360 was the lead platform and 3rd party developers moved to the PS3.  It was not because the PS3 was more powerfull, it was because it took longer to get parity with the PS3 compared to the 360.  3rd party developers do not think like gamers.  They are not looking to push each hardware to the max.  They have a set target for all platforms and look to make each one reach that target.  For the PS4 its easier to reach 1080p/30 than 1080P/60.  Do you think 3rd party developers are going to put the extra effort to make the PS4 reach 1080P/60FPS when they can make both versions 1080P/30FPS.  This is what I mean.  Its favors the 3rd party developer to make both platforms 1080P/30FPS then put in the extra time to get the PS4 to 60fps.

Your second bullet point is no different from last gen.  Nothing has changed.  The 360 was the eaiser platform to develop for but developers spent most of their effort getting the PS4 on par.  The parallels between this gen and last are the same.    Roles have been changed but for the 3rd party developer their situation is still the same.  Make a game that plays and looks great on all supported platforms.   

What I am trying to say is that yes, the PS4 has the hardware edge and we will see the difference probably in 1st and 2nd party games but on a whole we will have the same situation as last gen when the 360 held the edge in game comparisions but for most of those face-off you would have to have both games side by side or blowing up a texture to see the difference.

WHAT???  What reality, exactly, are you living in?  The PS4 is the lead platform for most developers for three reasons.  One, it's the most powerful platform, two, it's easier to develop for than the XB1, and three, the install base of potential customers is triple what the XB1 is!

No developer in their right mind would consider shifting to the XB1 for their lead platform!

Very deju vu moment. During the PS3 era when Sony had to send IBM personnel and Sony personnel to help Epic get the Unreal engine up to par sounds very similar to MS having to send their people to Bungie to get Destiny up to par. So even with companies like Bungie who are big, the onus to add features or capabilities falls on the platform owner. Even Bungie wasn't going to put in that extra effort but if MS wanted a big game to be on par, they needed to send their own resources just like Sony did back during the PS3 era.

Hmmm wasn't this the same scenerio during the 360 era.  Man I wonder why they did the same thing back then as well.  I guess those developers must have been crazy.  Really could it be that 3rd party developers look at a problem different then gamers.  The way you talk, you would think software sells like crap for 3rd party developers on the X1 which i believe is definitely not the case.  The priority you are looking at is more gamer specific in how you think then how a developer runs their business.  A developer wants to gain as much sells on all the platforms they release on.  If one platform is eaiser to get up an running, means it takes less time, effort and resources to do so.  For a project, you need to know how long it takes to get the part that takes the longest not the shortest.  You need to know what you can do on the weakest platform more than then the most powerful because you know you can make it work on that platform.  You are not thinking of the project like its a business.  

You (and many others) are still making the mistake of comparing this gen to last.  It's a whole new game this gen...and the (modest) success of the 360 has nothing to do with what is going on now.

Clearly bigger than 360/PS3. Though I dunno if I've heard anyone argue otherwise.

I'd actually argue that the difference last gen was a lot more noticeable. 720p vs sub-720p on 1080p screens is much worse than 900p to 1080p difference, as well as 30FPS to a lot less than that, which was the case in most PS3/360 multiplats, while on XOne/PS4 you have a minimum 30FPS constant on the majority of multiplatform games.

Ryse is not the best looking game this gen.... Infamous and killzone are both 1080p and look better.... Infamous is even more impressive since it is an open world game.....

Also ur wrong, the RSX was inferior to the 360s GPU, the cell if used and optimized to its peak, would push the ps3 above the 360.... But it wasn't the difference u see between the ps4 and xone.. Which is similar to the difference between maybe ps2 and GC or Xbox 1