Not to be blunt, but when google is basically the best search engine available, why would you ever need to use any other?
Now, back on topic, I highly doubt the ps3's gunna put any serious dents in microsofts profits. Microsoft's actually got my attention with the XNA Game Studio they're working on, which is exactly what they want.
Between the two though, I do have to go with Google. It _is_ the only corporation you could even start to compare to microsoft, although microsoft is dominating the os market for now.
But tomorrow, who knows? Maybe Google'll announce GoogleGooey (GoogleGUI), their new operating system with full windows xp compatability (any os without that ability right now is at a serious disadvantage due to how many GAMES and GAMERS are using windows). Or, maybe not.
Regardless though, Google's in a powerful position - change is a dangerous game, but they're playing it better than the cpu plays monopoly on hard.