I think that with the technology getting more advanced every day in 3D software - it is the dream of the likes of SoftImage, 3DMax, Lightwave and Houdini that Maya becomes an Apple-only software which will make it virtually disappear from the market.
If Apple does take over Maya - I do not see a line of professionals buying Macs - as you well know - the big studios use whichever software that is good for them at the moment and do not have any commitment to this or that one.