This push of hardware may be for 4k videos and not necessarily 4k games. It may also be for better VR. 4k games are an absurd idea that probably no one even considers tbh.
Plus, it's not even talked about in the article. What motivated your comment?
4K is the whole reasoning behind the "PS4.5" being a thing. It's been mentioned from the very beginning. Yes I agree, it's probably for the VR aspect, but the real issue is going to come when games actually run better on the 4.5 hardware. "Early" adopters get screwed, which defeats the purpose of console hardware.