That is what I am wondering. The problem is that mirrorless spans a multitude of EVILs (excuse the pun). Depending on price, size, features and lenses, it could span anywhere from where the G series sits to where the Leica M9 sits. That may give a hint as to why runaway success is eluding the mirrorless segment at the moment.
I guess my biggest quibbles with my G11 are the sensor size (and associated DoF and noise issues), the shutter lag and f/2.8 not being bright enough at the short end. In reality I don't need an interchangeable lens system for my pocketable camera. If I want anything longer than about 150mm (35mm normalised) I may as well use a DSLR. That requirement set shows absolutely no need to a compact system camera!
That said, I think that in the longer term, the days of reflex mirrors are numbered. Within 5 years it would not surprise me if most "single lens cameras" have done away with the reflex mirror. The biggest stumbling block may still be a decent EVF.
Thats always been my feeling, espeically now the Nikon's smaller mirrorless doesnt seem to save much space.
I wouldnt be supprized if the delay to the G13 is a response to the X10, manifactures should really have been pushing up sensor size for manual high end compacts well before now so hopefully that camera kicks off a shift in that direction? The X10's lens size doesnt seem to have become that large even with the large appature thoughout the range so I can see potential for Canon to push things even further with sensor size.
If Canon creates an interchangeble lens mirrorless then I think there better off aiming above not below m43. To me the most obvious gap in the market right now seems to be between the X100 and NEX, crop size sensor, a couple of bodies(one larger prenium with a hybrid OVF/EVF and one budget without) and a range of small primes that balance well with those bodies.
I don't necessarily think the G-series needs to move into the interchangeable lens arena in order to compete. my ideal G13 would be the followings:
sensor size between 2/3" and 4/3" sensors ... 1" sensor? similar to Nikon's 1/CX sensor
integrated lens, 24-70mm equivalent, f/2 fixed
good FPS (5+)
HD video options
smaller than Nikon 1/CX
if this sold for G-series prices (~$500), would you buy it? I'd definitely buy it instead of the Nikon 1/CX cams.
I feel like camera companies miss the point when they make interchangeable lens systems on very small sensors. people don't want interchangeable lenses just to have interchangeable lenses. they want them so that they can shoot differently. what's the point of a wide fast prime if your sensor offers you no DOF control? what's the point of a supertelephoto if your AF tracking and body handling characteristics suck?
I feel like people buying cameras in this mid-range segment want a do-it-all upgrade from their do-it-all P&S, or they want a backup camera from their existing DSLR system. the G-series does that just fine, and would do it even better with a slightly larger sensor and a wide-angle wide-aperture built-in zoom lens.