If Halo2 is the monster hit people expect and it sells into 2006, it could actually compete against Xenon (assuming it doesn't have backwards compatibility).
People find they can't play Halo2 on Xenon? Unless the Xenon games are really compelling (and for many people, maybe HDTV resolutions may be compelling enough), people may opt to hold off on buying the Xenon until Halo 3 releases for the Xenon.
People find they can't play Halo2 on Xenon? Unless the Xenon games are really compelling (and for many people, maybe HDTV resolutions may be compelling enough), people may opt to hold off on buying the Xenon until Halo 3 releases for the Xenon.