Wasn't the G1X the first?
the first what? Oddball-sensored (4:3), too large-bodied, too slow-lensed, too highly priced, tunnel-viewfindered, pseudo compact camera that hardly anyone bought?
Had Canon stuck the regular APS-C 18 MP sensor into the G1X back in 01/2012 ... and sold that beast at exactly the same price as the then cheapest Rebel [T3/1100D] with kitlens ... who knows, it might just have been successful and Sony's RX-100 with the smaller 1" sensor might not have become such a huge success. :-)
That's a matter of opinion ... don't you think?
All the m4/3 cameras are same "oddball-sensored" (4:3) and G1X sensor is even bigger. I'm not a fan of large sensors compact cameras (specially those without a decent EVF), but I think that 4:3 ratio is brilliant for portraits (in vertical position) and you can crop it if you don't like 4:3. Canon shouldn't have included that tunnel-viewfindered and they fixed that mistake in Mark II. Of course, there is big pile of stuff that should be improved. There is no perfect camera.
G1X is too big - RX100 lacks grip
G1X has bigger sensor - RX100 has faster optics
features vs price, looks vs. ergonomics, etc.