ARM is cheap but weak at single core performance. Older games and many new games need good single core performance. Yes, the 68k has the potential to have single core performance as good as the x86
Who cares about CPU performance ? The GPU is the thing that's important today. Any CPU is fast enough for gaming today and that's what is important.
Have you seen how weak the CPU found in PS4/XboxOne is ? And it's fast enough to emulate correctly a 3-core Xenon from the Xbox 360...
Yes, the 68k has the potential to have single core performance as good as the x86
"Has the potential" ? Via reimplementation on a FPGA ? Seriously ?
The 68k is dead. You seem to be driven by your nostalgy of the eighties. Gamers want games... they don't care about the CPU/GPU you may be using.
Some may be interested in Amiga games, but it's far from the majority, and UAE is more than enough for these people.
Sony chose MIPS because it had a meaning, changed to Power with the PS3, and made another change to x86 with the PS4. And people are still buying Sony consoles.
If CBM was alive, they likely would have switched architectures too, and hopefully would have rewrote the OS to be ready for such changes.. Which hasn't been done yet on the Amiga.