- Automatic background syncing of trophies when they're unlocked.
- When the indicator in the top corner is showing for unlocking a trophy, or receiving a message, holding down the PS button should open said message, or bring up trophy details.
- An ability to open up a cache that reserves ~500mb on the HDD to allow for faster XMB loading, faster info on people's profiles (rather than redownloading trophy information every time, it stores trophy information already downloaded), faster loading of friend list, etc.
- A search function for the music section.
- Changing the way updates work. Instead of forcing everyone to download a new firmware for every little bug fix, there should be an "Update Centre" in the "System" section of the XMB. This should work much like it does on a PC with three different levels of importance: Critical, Recommended, and Extra. Critical updates issue big changes to the system, these are forced downloads. Recommended downloads are optional but add features that people have been hankering for. Extra will just be things like new video codecs, or support for new audio files, iPod support (real iPod support), updates to the browser, etc.
I have many other dreams for the PS3, but these would keep me happy for a long time.