Yes, i think this is what i will doWell, I would say both
But I agree that it would ultimately come down to the games you'd like to play that aren't available on the other platform.
Although let me say that the 6600K and 1070 are still decent machines. Even for nowadays. With that logic I would go for the PS5 if you're interested in their potential exclusive games and then slowly start upgrading your PC piece by piece (as that's the whole beauty of it) whenever you feel like you want to switch over.