One of the biggest features I think would revolutionize AirDroid would be the ability to automatically sync/backup your Android and your PC upon connection. Not to say this isn't already an amazing app, but I think this feature would make it 100x better. Possibly some way to scan and keep a cache on both the PC end and the Android end so the program will know what needs to be updated. Also the ability to select what to sync/backup, contacts, messages, music, videos, and custom folders. I can't imagine this not being the number 1 app on the market if this were to become a feature.