Only solution is to do another series of ads like the original iPod ads. Man sits at computer, (iMac), records guitar through GarageBand, imports to iTunes, plays and imports to iPod, plays as leaves apartment.
Then a simple iMac + iLife + iPod, Apple.
Lesser shown ads could include iPhoto importing while working with Pages on a MacBook Pro, (drag pic from iPhoto to exposé in a corner hotspot and select Pages and add photo), print out and add to report folder.
Importing family video from Camcorder through iMovie, possibly add a short slideshow, add soundtrack and burn. Cut to evening with Mac Mini connected to TV and use Front Row to play DVD.
Video talking to family via iChat, new member joins chat. That way each time we also cut to new member "live", different Mac shows. Finally the final member joins, Grandparents obviously living abroad and original person lifts new born grandchild to iSight so they can see them rather than just receive pictures and letters, (I actually used this scenario when the G5 with iSight came out and showed one elderly woman this after I picked up on her children living abroad and not seeing her grandchildren much, she was close to tears when I suggested this use).
May need brushing up on, but I think this campaign if widely used enough would lead to more switchers than ever. They could even show people using Office and other cross-platform apps subtlely to make a point.