Sure, for now. But it might create more stable ICs, or might even break some limitations due to heat runining up no the center of the CPU.. if a SoC can suddenly be x times as thick / have more layers, you can have shorter paths to different components. Which is faster again. The area of a wafer would remain the same, but I’m not sure about the economics of silicon wafers (thickness vs area). Less area mean less surface area for imperfections.