Its a fair point, but as far as migrating away from PC games due to cost of GPU is going to be negligible, in my opinion. However, we will have to see. The driving need behind migration from X console to Y console vice PC will be availability of software (instant gratification, if you will or exclusivity to X/Y/PC.) Ray Tracing comes to mind, but will it have that much effect? I, personally, doubt its effect will be much to an average [insert non-streaming gamer] player of games. I believe this biggest drive will be because of how deals go down with content management software rather than hardware.
Lets say the regular PC gamer has older but equitable hardware of the new consoles; what would make them go away from any PC to any console? Especially if the games they play are cross platform? Conversely, what would make a PS5 gamer switch to PC if hardware is comparable? The cost of an upgrade(GPU @ $500ish) would not make me buy a new console (@$500ish) and vice versa.