I will still buy it, but only for the games that I really wanted to play right away. But TBH, the game price isn't going to increased next gen, since there's no justification for gaming company to do that due to they still making profit with the $60 price tag.
Even the $70-80 for a "full game" has already happened today with the "deluxe edition" versions, where they include the "season pass" for the game, which basically the game base contents that were cut and sold seperately for maximizing profits.
Lastly, there's no guarantee that all the microtransactions will magically "dissapeared" in every game, even when they increased the price to $100 for base game. Remember, most of them were corporates that wants maximum profit from everything they sell, even by implementing underhanded stuffs, like pay-to-win mechanics or microtransactions.