So yeah, I needed one of these. It's really light, really fast. Benchmarks from Geekbench are nearly at what my first unibody MBP was, so that's impressive. At 1 pound and the ability to palm it one-handed, I don't much see the point in the Mini anymore, except perhaps cost.
I use mine for a ton of stuff, from work related remote access/support, to email, books, games, movies (with three kids, I watch more movies on this than I do my 55" HDTV), and music stuff. This will handle Ampkit/JamUp/Sampletank into GarageBand without issue, and will do 32 tracks in the latter.
I'm pretty geeked about it!
Note the piss yellow case.
That the new iPad?
Honestly, I can't take looking at my iPad 2 anymore after getting used to the screen resolution on my 5S, so I'm probably going to get one of these.