Capable?
I have to agree that the Rev A macbook air is a plenty capable machine.
My girlfriend just received hers and it is a real treat for her. Though it does not have the raw power I am usually looking for, this machine does everything it should, and ... actually shouldn't. For instance, I ran a 1080P .MKV file and it played fine. Of course there were hiccups, but they only happened when huge explosions and actions were splattered on the screen (I was watching The Dark Knight).
As for youtube...nope, there's not a problem there. I had really expected for this machine to suck with all the bad press. But man this thing doesn't even get scalding hot like the 12" powerbooks did. I even used it on the bed watching more than 10 videos of Youtube with my girlfriend.
I stress tested it like crazy, and it only slowed down, no core shutdowns or freezes. At one point I opened garageband, imovie, calendar, itunes, iphoto, ichat, safari, mail and textedit all at the same time. It took around 60 seconds to get each one of them open. Then I took it further and actually used it with all of the applications open. Soon I had 4 windows of safari, while i was playing a youtube video and syncing my mail through POP. Then I ran Geekbench...again with the 9 applications open...and I got a score of 1985 (I geekbenched it after this stress test and got a score of 2105). After that I opened 4 more windows of safari...playing 4 youtube videos. I expose'd and it worked without a hitch, movies at real-time and all.
And then something amazing happened.
The fans turned on.
It was at that moment I realized that I wanted this computer. I had forgotten about fans at that point. But I did check the heat of the computer and it was no hotter than the hottest my aluminum macbook gets.
That's just the computer stuff too. With design and usability, nothing beats this computer. Its screen is amazing, better than my dell 20 inch screens. And it's design is wonderful. The weight also is very noticeable. The people that don't believe so...try carrying a 15lb messenger bag around a university for 3 years. Then put an air inside the bag, replacing your current computer. I bet I will hear a sigh of relief from your mouth.
If this Rev A computer can take the crap I just through at it, then I want the Rev B, and would gladly trade my unibody macbook for a Rev B Air with money on top.
Anyone considering this purchase of the Rev A, by all means pull the trigger. This machine is a beaut.