What exactly IS an "ultra book"? and how does it compare in performance to
your typical mass market Dual core CPU Notebook computer?
(rhetorical question to make you think to yourself about the answer)
what exactly does a quad core notebook do that a dual core notebook doesn't?
Frankly, not a whole hell of a lot...
From my point of view the whole idea of an "ultrabook" computer answers a question I'm unaware of anyone (anyone both sane and intelligent) having asked....
With a more powerful CPU it MIGHT boot faster, but swapping an SSD into a $600 dell will accomplish that... as far as accomplishing anything material like say... video transcoding? why would you bother doing that kind of work on a portable computer?
The CPU is not the bottleneck in speed for most common tasks and as far as reading your e-mail or checking your ebay watch-list on the go frankly a 5year old Pentium M notebook will do that just as well as the quad core desktop I have at home...
So what the ultrabook really is when you come right down to it is a talisman to prove that you can afford one, and after spending 3-5 times as much money on it as a consumer level 15" notebook from Walmart you'll be lucky if it does anything as much as 10% better than that $600 Walmart Dell.
That is to say, that anything more than an $800 notebook is getting into
"Diminishing returns" in terms of performance/$
Because most of what people ACTUALLY do, as opposed to what they self-dilusionally fantasize about doing, has more to do with their internet connection speed than the CPU speed of their portable computer.