Today the owner of Sony Ericsson XPERIA X10, X10 Mini and X10 Pro can have the update to Android 2.1 Eclair.
The X10 update will include 720p HD recording, new backup and restore application, 5 homescreen instead of just 3 and social phonebook.
For the owner, check out for firmware update on your PC Suite and make sure to update it.
Thanks for reading. Hope that will help