I'll likely end up buying one ... begrudgingly. However I hope they have a way of transferring our downloaded games to the new machine. I have hundreds of gigabytes of games downloaded that I DO NOT want to have to re-install from scratch again. That would be the biggest hurdle when it comes to me buying one.
Also I just assume the extra horse power will end up just 'upscaling' 1080p games to 4k rather than actually being natively 4k. Just like when we went fro SD to HD initially, a lot of content was merely upscaled by hardware.
I guess we'll have to see what happens. If the games are in fact upscaled, for me it's a reason to hold off a bit. I'll probably wait anyway to understand what a new console does in relation to their VR stuff. I just have a feeling 4k and VR are moving so fast that they're making a move to play in that space but the tech isn't mature enough for a company to deliver hardware today that will actually make sense. They're going to have to adapt again in a few years anyway.