Goods start, I agree with your specs, but I think you're missing about half of the necessary features!
If its ultra portable with less features, it had better work outdoors AND in the dark, so:
1) non-reflective, bright displays are a must.
2) keyboard with backlight
Then, if its gonna be so portable, it had better be able to connect in places without WiFi...
3) needs to have an option for 3G, UMTS etc, like a GOBI 2000 combo with world wide connectivity.
Also, at around 1000 bucks, we don't want those things to be annoying,
4) a fairly quiet cooling system is needed
Since most come without optical drive, it needs to be easy to connect one concurrently with a mouse, so
5) three USB 3.0 connectors should be obvious.
At this point, its actually impossible to find all of this in one ultrabook. I know, cause I tried. I could not find what I wanted, so I didn't buy one yet. Who wants to spend over a thousand bucks and still end up with a compromise thats not dictated by whats possible, but simply cause manufacturer's aren't flexible enough in offering configuration. Dell pretty much cut configurability out of ultrabooks. There's nothing you can configure, just add mice and bags and insurance. Most of them do not offer a glare type and a matte display. That should be a no brainer, to at least offer it. Not all consumers are retarded, people buy their mirrors at Bed & Bath.