I like the new ad. Sure, it may not tout specs and such, but that's not really Apple's style now, is it?
Also, bear in mind what an advertising agency (like Chiat/Day) has to go through when brainstorming ads... they have to think about who this ad is for. They could have chosen specs... instead, they chose to personify the iMac. I think that was a very intelligent decision. After all, we've known the whole time that Macs are computers with soul... This is for people who are probably afraid of computers, or are simply fed up with the same ol' PC...
Also, yes, notice the lack of "Think Different" in the ad... I suppose this is the transition period to "Everything is easier on a Mac" logo.... shame they didn't really use it, though.
Also, I agree, the guy should walk into the Apple Store and BUY the thing. Maybe even change the song to "How much is that doggie in the window?" Okay... so, that might be stretching it, but yes, he should go in and buy it from the Apple Store...
Overall, a good ad. Not fantastic, but good.