This isn't exactly new news. I've had IE 7 for months. In fact, the tabs were the only reason I still used Firefox. Now that IE has tabs, I've avoided Firefox except as a backup. I know, I know all you Firefox circle-jerkers love it and everything, but until Firefox caches clicks and performs to the specifications I require (which IE currently does), I'll continue using IE.
*prepares for an onslaught of Firefox fanatics to get offended and try to convert her to their cause, as if brower preference was as important as solving world hunger*
P.S. Oh noes! A piece of software now has features that a previous piece of software had! It's obviously a ripoff! Let's all storm someone's castle and cite our indignation at Microsoft ripping off a feature from somewhere else! Because that never happens! And it's okay for Firefox to copy IE features because Firefox is hip and the underdog, not like Microsoft which is a giant huge corporation that eats kittens!
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If only fools fall in love, then that means the human race is fucked.