2) Fast shooting... yeah... 4.5fps are OK in my opinion.
OK? Thats bloody stunning! I paid 1.5k for my Oly E510 and had 3fps and that was considered Fast 4 years ago with the 50D at 6fps.
4.5 on a compact body with a APS-C sensor.... ZOMG!
The only hurdles you might have is, yes, the price because its not out yet so there will be a "new" premium and its good.
But Id never get a G12 anymore - Imagine having a G12 but the Sensor is NOW SIX TIMES BIGGER!!!!! That to me = WORTH THE PRICE.
But enough fo my fanboyism - I think Canon is missing a step here not chasing the mirrorless system
Canon was the biggest critics of the 4/3 system, and sure, it wasnt the best sensor in a DSLR but seriously we were using 4megapixels to make billboards at one point, 4/3 made DSLR's really small, and not Oly is making a killing and LEADING the industry by going even smaller. I think Canon has pie on its face and doesnt want to admit it hence its late late late entry into the arena with the awkward GX1.
Sooooo if a Interchangeable system is NOT what you want, the GX1 is the right tool.
But it would be nice to one day have a compact and then MAYBE... just maybe attach some canon lenses to them.
Just like Oly and Panasonic, we might end up with a Canikon compact mirrorless camera?
1) Olympus OM1 [Zuiko Auto-S 50mm f/1.8]
2) Pentax MZ-60 [Sigma 28-90 & 100-300]
3) Canon 7D [EF-S 15-85 & 70-200mm f/4 IS & 50mm f1.4]
4) Leica M [50mm Summicron Pre-aspherical - Silver]http://www.poetproductions.net