I received very small pieces of rumors from people that claims to have seen and/or tested the G3. They all do confirm that the G3 has an updated body design. It’s smaller than the G2 (less high, less thick, less wide). The camera has less manual controls and is much more touchscreen oriented than the G2. The Q-button is integrated into trash button. The left dial is completely gone. As I already told you weeks ago it’s exactly like having the GF2 instead of the GF1.
The 16 Megapixel sensor definitely brings an upgrade compared to the G1/G2 sensor but it is not as good as the GH2 at High ISO.
There are no other new features (P.S.: price $649 with 14-42mm lens). And there will be no new lenses. The real exciting stuff will be announced in late August. And in June Olympus should announce at least two new Micro Four Thirds lenses.
Reminder: Rumors classification explained (FT= FourThirds):
FT1=1-20% chance the rumor is correct
FT2=21-40% chance the rumor is correct
FT3=41-60% chance the rumor is correct
FT4=61-80% chance the rumor is correct
FT5=81-99% chance the rumor is correct