First of all, good luck trying to play GTA V on a PS4 or Xbox One. It's not coming out on next gen consoles.
Secondly, I think the point you're trying to make is that there is no reason to buy a next gen console to play games, as the current gen consoles also play games. We're effectively paying just for new features that the current consoles don't have. If that's your thinking, I assume you're having great fun still playing on your Mega Drive/SNES. After all, they play games too, just like the current gen consoles do