There's no guarantee of anything. Period. Nexus may be the Google Phone but they will drop it (remember Nexus One?)...
Android has a flawed history of fragmentation. Remember guys, the vast majority of folks have no idea what a "ROM" is, nor do they want to spend their days hunting one down and messing with it. OFFICIAL updates for Android devices are still lackluster at best (and that's putting it nicely). What's ICS up to now, 8% of devices?![]()
Its around 11% which is what was announced this morning. And it is starting to climb as they are getting them out more rapidly now.