That's impossible if your definition of desktop is the current mobo+dimm status quo, short of putting HBM onto the chip exclusively for the APU. Memory bandwidth is the heavy limiter, it's why strix can't use sodimm's as lpddr5x blows sodimm bandwidth out of the water and the iGPU would otherwise be severely bottlenecked. Wendell from L1T thinks the future is mobo's based on mobile CPU's, basically miniPC's in an mITX/mATX formfactor consolidating mobo+cpu(+memory if not using CAMM2 or similar) into one unit that you can optionally add a pcie dGPU to. In that world relatively powerful APU's are possible without expensive hbm, I wouldn't be against it either.