Whats your logic behind that? Current phones with 10gb of ram and 8 cores already surpass average computers. Its only a matter of right user interface.
It's not about the hardware (who am I kidding there, of course it is... ARM SoC's, blech). It's about the software side of the equation. Maybe Purism can pull this off, but Android definitely can't (and not for lack of trying, see Samsung DeX), and iOS is going the other way, with macOS getting more iOS-like over time.