Fix home automation. I don't expect it but I want it. The current status of home automation sucks mainly because there are some many companies involved. Apple can handle both the hardware and the software so the overall experience would be so much better.

The PC experience was in disarray before the Mac. Once the Mac was introduced the experience began to get better. Keep in mind, better does not mean perfect. I think they can do the same for home automation. It won't be perfect but it will be better than what it is now.