Interesting point. However it seems like the only way to make big money on the internet is through advertisement and Google has that market locked up. Chrome is just another tool for their social data-mining. I'm sure they keep logs of what searches your IP has made (if you use Google Search), what emails you have read (if you use Gmail) and what websites you visit (through Chrome). If you sign up for any of their services then they can tie a name to an IP and then track what other computers you use (so they will know for instance that a work and home computers belong to the same person). This way they can profile people and then carefully target advertisement towards them.
So then they funny result is that the more people use them the better they get; and the better they get, the more people use them. It's a perpetual motion machine, they feed on their own sucess so it almost seems impossible to catch up with them.
So are you saying that microsoft is trying to replicate this with the Bing, IE, Live/Hotmail ? Clearly that won't be enough. They're gonna need a huge innovative breakthrough to win this battle...