Same here. When my iPhone 5 arrived I basically turned it on, chose 'restore from iCloud backup', waited a few minutes, and presto: all my apps and their data, settings, text messages, address book, call log, etc, all transferred from my old 3GS.

I still had to sync all my music from iTunes though, but I don't see how the Surface would be able to do this without requiring to be 'tethered' (iTunes has WiFi sync) to a PC.