The 13" MBP is a solid computer, and will serve you well for everything but gaming with newer titles, and perhaps 3D work like solidworks. It's also set at a price point which makes it a very good buy for many users. I just bought a 13" MBA which now appears to be my wife's new computer.
The SSD in the Air gives it a definite advantage over my MBP, but I still like my MBP. It's just a little bit more versatile and a little cheaper. This makes it very desirable to a budget minded Mac user.
My concerns when I bought this in an emergency scenario last February:
- Resolution; It's a little bit of a deal, but not as bad as I thought. With the use of spaces and the ability to resize windows it's not that bad. Mind you, for work sometimes I'm connecting to user machine where they are running dual monitor 1680x1050, and I can still navigate okay. Ideal? No. Manageable, yes. I'd still prefer 1440x900@13" screen, 1680x1050@15" screen.
- Graphics; This is definitely the weak point. If they sold a MBP 13" with an ATI 6750m discrete GPU I would be all over that like white on rice. Nonetheless, it seems I can run game titles from 2007 and before on medium-high graphics. This is good enough for my light gaming.
- Weight. Yes, it's 50% heavier than a 13" MBA, but I rarely carry it in more than a sleeve nowadays. It's a non-issue. I'm still walking out the door with only 5.5lbs of extra weight.
- Legacy; I still have an optical drive, the ability to change out the memory and hard drive to SSD, (and plan to). All at a reasonable price, less than a loaded 13" MBA.
This means I could theoretically use this machine for the next 3-5 years and it would still be decently fast for most general purpose use. This is why if I could only have one machine I think it would be the 13" MBP. At least right now. We'll see with next year's Ivy Bridge refresh.
