When next-gen kicks in - IBM will hold ~90+% of the gaming CPU marked
The gaming market includes the PC market and Intel/AMD between them own 95%+ of that. Besides IBM is simply supplying CPUs to three competing game console manufacturers, and gaming is difficult to lock into any architecture, unlike the PC because gaming code is rewritten for each console. The early 8bit consoles (Sega/Nintendo) were dominated by the MOS Technology 6502 family of CPUs, but that didn't stop Sega master system switching to the 8 bit Zilog Z80A while Nintendo NES switched to the 8/16 bit 65c816 from MOS Technology. IBM may be supplying all three console manufacturers, but it doesn't have a lock on the market like the ix86 family does on the Windows PC market.