The PCE (and by extension, TG16) proved that outside of games that relied on high processing speed (3D games like Elite, or sports games), 8-bit CPUs could give every bit as compelling an experience as 16-bit chips.

Wonder what a good programmer could do with a modern 6502-based ISA clocked at 20+ MHz but otherwise identical hardware to <insert favorite 6502-based platform here>. Imagine being able to hit I/O registers on every single hardware cycle because your CPU blows that out of the water (see: SuperCPU on C64/128 which can very much meet the demands of "write a new value each 1MHz cycle")