DIGIC 6 will make a huge difference in performance...just look at the G15 to G16.
The wider angle on the lens would be greatly appreciated. The touchscreen will be nice, and keeping the swivel screen is a must. I think that the G1X replacement absolutely needs to have wifi, though, and should also have GPS too. Especially if they want to introduce it at a price point as high as the first one was. I find it hard to believe these are not in the spec list.
I would appreciate if they could get the aperture at all faster, though. Better focusing, too. I feel like the dual pixel AF would really be appreciated here. The original just hunts too much in low light, and can't do proper close focusing or macro without fiddling around in the menus.
I'm glad they're continuing with the G1X line, at least. But I'm guessing I can stop waiting for that firmware update to the original that was supposed to improve all the focusing issues (like the M got).