Other than work, my Macs aren't used much thanks to the iPad.
Only time I had to use my MacBook Pro at home was when I scanned some photos.
Hoever, iPad is also working great as a companion for the Mac mini media center/server. Desktop Connect is letting me control everything from my couch. I can play pandra through Mac mini to AirTunes, rip DVD, stream movies all from/to iPad. Oh I can use flash contents like custom bag design on timbuk2.com on iPad using VNC'd Mac mini screen as well. iPad is the ultimate weapon for couch potatoes. 😛