It's the same thing with Android vs iOS. With MBA, there are only a few configuration options, and the $999 MBA has terrible specs. With Ultrabooks, if you want a $2000 killer Ultrabook that can run Crysis, than you can buy one. Or, if you want a cheaper $699 Ultrabook, than you can buy one. We've already been through this:
Android vs iOS
Windows vs Mac OS
The Ultrabook/Ultraportable market and tablet market will be EXACTLY the same. With Apple, only a dew configuration options/1 choice and 1 price. With Windows/Android, you get 100x more options. People nowadays just want form over function, and thus, Apple is most sought after, but soon people will realize, "Why get a 64GB + 2 GB MBA, when I can get a 128 GB + 4GB Ultrabook at the same price, and has a better GPU?"
On a side note, AMD will definitely rule the Ultrabook market. Their CPU's ain't that bad. I would definitely buy an Ultrabook with Trinity over Ivy Bridge. Why?
1. Great graphics, and you can play games on med. settings.
2. Great power consumption. 20 W max in an ultrabook.
3. Cheaper.
Yes the CPU is weaker, but it's not by TOO much. Trinity will be a lot faster than Ivy Bridge in gaming. AMD will rule the tablet/Ultrabook market and Intel will rule desktops/laptops. Also, can't wait for Kepler/Pitcairn in Ultrabooks, though it will take time to get the power consumption down. Personally if I were to buy an Ultrabook without discrete, I'd get Trinity, with discrete, I'd get an Intel with Kepler/Pitcairn.