Depends on the market they're shooting for really.
I'd gladly buy a second PS4 after 2 plus years, even if it were just for playing 4K movies on BD.
Admittedly, my BD buying rate has dropped to a fraction of what it was during the PS3 generation, but if I buy non streamed films in 4K, that's a lot of additional drive space being eaten up per movie. I'd rather buy 4K movies on optical media for that very reason.
If SCE makes this a $600+ console, I would honestly start looking back to building a $1000-1200 4K multi-purpose PC instead.
If it's a $400 console, then expectations of what a $400 console can have spec/component wise has to be scaled accordingly. We won't be seeing even GTX970 level performance unless SCE proves its brilliance in leveraging a strong market position into an incredible OEM contract with AMD.
So with an incremental CPU and GPU upgrade based upon what an MSRP of $400 buys in OEM specs, I would expect 1920x1080/60fps minimum across the board; no exceptions. More realistically, the specs should support 2x1920x1080/60fps, but that is probably a bit too pie in the sky unless SCE leverages that incredible OEM contract with AMD.
I'd settle for better effects, shaders, lighting effects, etc. for overall more realistic graphics. At this point, we're looking at the PS4K like a mid grade CPU/GPU upgrade to the PS4 low/mid grade gaming PC.







