"might" ?
It's surely a game changer ... how many times haven't many of us picked up long-tail traffic that they didn't ever think of and started drilling down for keywords in that topic ... now that's gone (almost completely)
Guys, I wouldn't over-react just yet. Big G is saying that only single digit % of Google users use Google Search while they're logged on their Google Accounts.
Surely, single digit is still massive amounts of traffic when we're talking about Google, but still it leaves us with a lot to work it. I don't think this spells the end of tools like Market Samurai just quite yet.
What I think is _really_ bad is the fact that in the future (or actually even currently), this will really affect mobile users. Already, Android devices tie your Google account into every possible action (and keep track of it too I'm sure).
