http://www.pioneerusa.com/StaticFiles/Manuals/Navigation/AVIC-X910BT_OperationManual0512.pdf
I can't see anything in there that warrants a change from 2.0 to 3.0 - music is still muted instead of paused during a call, for example. I suppose 3.0 could simply be bug fixes and speed optimization. If they do that perfectly, I guess I'd be satisfied with the lack of usability improvements.
All I could find was the expected iGo 8.3 features -
Page 37: Lane Recommendation
Page 38: Heading-Up Mode
Anyone else find anything useful?