Complex post Eleman.
I say, review the history of 8,16,32,64 bit systems and see what all helped improve. No doubt, for each addressing change, backup hardware had to scream along at Moore's Law and more, but somewhere in there, the addressing matters. I think I can (barely) cite the case of the C128 that had to do hard bank switching to max out to the limit, and if you just look at 8,16,32 bit games, you see stuff.
64 bit hit a new realm. For the least of examples, it took a stratospheric boost to chess, because a 64 bit board could do things no other set could do before.
Then you have X today's games, whatever they are. A little work needed in modeling art, and we're still "only" at 64 bit. Like it matters. If anything CS has taught us, when we jump a Bit-Level, the game changes. Who's gonna post the first 7 bits of 128 bit news?