I really hope this ultrabook meme ends.
Although I don't really care about how thin it is, per se. Weight is what matters.
For those 4 groups, most ultrabooks suffer from:
1. Being underpowered (for gamers and some engineers this means graphically, for programmers memory/cpu count/cpu speed)
2. Insufficient ports (particularly for engineers, technicians, and some programmers and gamers)
3. Insufficiently sturdy (technicians, some engineers and programmers)
But often they do have good battery life, but by virtue of being underpowered that doesn't really help in the balance.
Companies that do make laptops (IME) aimed at gamers, tend to not make laptops that have decent battery life (that is, most desktop replacement laptops get good performance, but terrible battery life). And laptops aimed at engineers and technicians tend to be 3" thick, have terrible battery life, and have grossly underpowered processors and graphics, but they have every port you could ever want.
is that really necessary? my "work" is a complicated desktop c++ application. short of a 17" desktop replacement, there simply isn't enough thermal budget in any conceivable laptop design to compile this program in under an hour. thus, all I want out of a laptop is the thinnest lightest x86 machine that offers decent performance for web browsing, playing movies, and editing word documents.
I really hope for a future in which we can both get laptops that fit our needs.
It lowers the lowest common denominator, in other words. The gulf between "consumption machine" and "work machine" is now higher.
I have no experience with Apple hardware, but I don't think Airs have a reputation of being super fragile either.
The thinner and lighter form factor also does have its advantages; it's a bit more comfortable to handle when using it to watch video on the couch, for example.
Compromised performance is definitely true, though. (Or compromised thermals, or some kind of a compromise on that axis in any case.) Ditto for more or less compromised upgradability and replaceability, which is unfortunate.
I wouldn't necessarily want the thinness to end, although striving towards it at all costs is something I would also disagree with, and probably wouldn't go for the absolute thinnest stuff there is.