if blu ray wins, hopefully that will mean microsoft will get blu ray licensing to make an add-on external unit like their hd-dvd one (which i don't have).
overall for me, though, it's not about what movie format wins. i went with what i thought had the best games, and i've been very pleased so far. i had the original xbox for at least 5 years with no problems too, so brand loyalty did play a part in my decision.