Very true. I'm definitely more weary of them as they get bigger and expand into more and more markets, but I think there will always be alternatives in the future. I mean, who knew Microsoft would be second in so many areas at this point?
It's just that in my opinion MS' lock in set the computer industry back at least 10 years. I think we could have a lot more advanced technology today if we hadn't been locked into an inferior platform for so long (today it's not as inferior, but imo everything pre-win2000 had superior alternatives).
I would hate to suffer another set back by too many people betting on the same horse again.
EDIT: Clarification