If Dropbox is a substantially better product (real or perceived), yes, the users complain bitterly (been there, done that).
If Microsoft is simply using bundling as an advantage of market share and undercutting the price of a competitor to drive them out of the market, then the consumer is harmed by the reduction of competition. Once the competitor is gone, what do you think is going to happen to the price and/or competition of that bundle? This isn't new.
edit: autocomplete mishap