Google has kept a record of all of the apps that you have downloaded over the life of your Google account. What does that mean? If you loose your phone and need to re-populate it you know what you had. Nice, paid apps as of now will re-download after a few clicks. I have not found a easy way to re-populate my android with the unpaid apps, hopefully that is coming soon.

Update; You can remotely updated apps from your computer: Awesome.