The news comes from TechCruch writer Frederic Lardinois who went to pick up his Glass yesterday. When he picked it up, he was told by the Google representative that Glass will soon be able to handle navigation and SMS independently of the device paired to it. The direct reason for this would be to break Glass of its dependence on Android, and allow it to work well for users with other smartphones.
The only trouble is that Glass doesn't have a built-in GPS receiver, nor does it have a mobile radio. It does have a compass built-in, but has to rely on a paired device for GPS signals. It could get your location based on whatever WiFi access point you connect to, but it is unclear how "independent" Glass can really get. Still, it's good news for the (likely few) users who want to be able to use Glass with an iPhone, WP, or BlackBerry phone.