I will say that the PS4 will be my last console if the PS5 isn't leaps and bounds more powerful. I'm still undecided on whether or not to sell my PS4 later this year and build a gaming pc. I'm tired of missing out on the full experiences the PC provides, and by that I mean stable/high framerates, uncompromised AA, and performance that just isn't found on consoles right now. Gonna wait and see what the steam machines bring and decide then. The PS4 and XBONE are truly underwhelming to me at this point.
What's wrong with just keeping the PS4 and playing other games on your PC while waiting for upcoming exclusives like Uncharted? It's your decision but the games coming out will look and perform better over time.