Just doing a side by side on a
2.13 MacBook Air 4 gig 256 SSD versus a 15.4" Core2 2.53 8 gig 256 S
SD I have been travelling with.
This is not about horsepower but rather screen and battery life plus portability.
Weight 3 lb versus 5.6 lbs.
That is significant given the screen resolution is the same.
I was concerned the smaller screen would be problematic and it may yet with tired eyes but the smaller form factor brings the Air closer to your eyes by a couple inches so that somewhat offsets that and the screen is very crisp for text.
The air is lower/thinner so there is no "edge" which is easier on the wrists.
SD card slot on both.
MacBook Pro only
Firewire 800 which enable target mode and is more reliable than USB transfers and allows some outboard devices.
Audio in - not sure of the implications here
More to come on battery life.
The real killer is the lack of a back lit keyboard
I'm going to add a 13" Air previous gen to the test group.
At $1850 the 2.13 air is better value for some than the 2.0 i7 as the 256 SDD tips the useability balance for the non- rendering user.