For a 2x crop sensor, this shot at 12,800 is pretty good. You have to look really hard to find the difference b/w the GX-1 at 12,800 and a corresponding APS-C sized sensor -- but the Panasonic GX-1 has a smaller form factor.
Why only 1 XQD slot in Nikon D4? Why no XQD support in Nikon D800? I suspect the upcoming Sony A99 will have dual XQD support? Why did Canon not support XQD in its EOS 1dx?
Never liked CF cards - too sensitive with the pins and all, and I've always suspected that the transfer speeds are overstated by the mfgs. Good riddance to bad rubbish ... welcome XQD, but I'll believe it when SanDisk announces their support for XQD.
Nice try Fujifilm, Sony, Pentax, Panasonic, etc. ... these are toys ... upgraded point-n-shoot cameras that are made to appeal to someone that wishes to carry around a smaller, more compact form factor. When I shoot casually, I grab my Nikon D7000 w/ a small prime 50mm f/1.4G, but when I shoot to capture the moment, I grab my Nikon D4 or if I'm shoot landscapes, my Nikon D800. Maybe someday these mirror less cameras will come to mature into something more than a hobbyist's toy but for now, it's just that - a toy!