Google already rules in search, phones, and now our social life. With Chromebooks they will get a bigger chunk of it.
They have ten times more potential for evil than Microsoft ever dreamed of having in the nineties, and they're mainly an advertising company, instead of a business-software supplier like MS or IBM.
Just to compare, Apple might be 'evil' and has a lot of indirect influence in the market, but an end user can perfectly avoid using ALL of its products with absolutely zero strength. Same with Microsoft today (except for MSN and Skype, or Windows if you're a gamer). Facebook and Twitter are the same, completely disposable (unless you're doing 'social marketing').
But to stop using Google, you need to jump trough hoops. It became like a drug dealer that's bringing new stuff day by day.
I used to root for Google, but these days I only hope for it to get smaller so don't get squashed. =/
Disclaimer: YES, competition is good, and Facebook NEEDS competition to improve, but I don't like the fact that Google is trying to 'rule', instead of pushing for open protocols (like OStatus), federation (like XMPP and e-mail) and such. I'd say that Google+ killed the possibility of having something like Diaspora (which was already dead, but there was still hope in the air), unless they go back and make Google+ federated.