I won't be buying a new PS4 if it has a bit more power either. TV's are still mainly driven at the moment by 1080p. Yes, 4K Tvs are filtering through but there is still next to no content for them so what really is the average consumer missing out on. Next to nothing.
Also, regarding the supposed PS4K, lets be honest here, all that machine is "likely" to do regarding games at 4K is a simple upscale job, and any games that do run natively at 4K are going to be your 2D indie type games or very very basic 3D games. It's not possible for the PS4K to have anything under the hood that would enable it to do anything otherwise, without some immense cooling going on or Sony making a stupendous loss on each console financially, which they just won't do.
For what its worth, I don't think the PS4 is out of date at all, games still look totally fine to me and am happy to play them. Been gaming since the late 80s and have never been a graphics whore or a framerate monkey. If it looks good and plays good, thats fine for me. And when you see titles like Uncharted 4, Ratchet And Clank etc just around the corner, how can anyone possibly say that looks outdated?