I run parallels on my mini and use the MBA to remote in. Use your MB pro for the heavy lifting and use the MBA as a fancy remote control that is nice to use from the couch.
That's just the thing... my point of view is that the MBA, rev B/C, with SSD is plenty powerful enough for any consumer's "HEAVY LIFTING." Seriously, I have thrown quite a bit at this, and it's fast and SOLID!
This is NOT an original MBA with problems doing things as simple as playing a YouTube video. With 2.13 GHz Core 2 Duo CPU, Nvidia GPU (same as in MBP), 1066 MHz RAM, and perhaps most importantly SSD, the MBA is plenty capable for everything from video editing, to web development, to entertainment, to powering up to a 30" Apple Cinema Display while driving HD content, to superportable on the go... this MBA is incredible.
It does NOT need to be "secondary" to any other Mac. Unless you're doing some intensive professional stuff requiring lots of RAM, or want to play video games (which run better on Windows), the MBA is capable and more!
People need to stop with this talk about iMac/MBP doing the heavy lifting... the iMac is a mobile CPU... the 24" LED ACD has USB hub, speakers, web cam, and LED backlit IPS display and when used with the MBA it is the perfect desktop.
The MBA doesn't have a Merom CPU running too much power anymore, it doesn't have overheated Intel integrated graphics, nor DDR2 667 MHz RAM, NOR a PATA drive... the newest MBA runs at over 2 GHz with two cores, and with SSD flies, and mine hasn't overheated or skipped a beat. The fan is always quiet, and the SSD is always FAST! For $1799 new, $1549 refurbished, the rev C MBA is plenty capable!
This is Apple's problem, the original MBA ruined the brand "MBA." I am nearly done defending this little guy, as I feel it has become too much of an investment of my time.
Bottom line, anyone that picks on the MBA with 2.13 GHz and SSD doesn't know what they're talking about! And that's just about all I have to say about it... it gets old, but Apple did bring this on themselves releasing that original POS! It's too bad the rev B wasn't the original... the MBA brand would be golden instead of troubled!