Well, that's where you're wrong...
Aliasing, Moire, Rolling Shutter, Jello, Resolving around 500 lines, no XLR, no clean HDMI, Ungradable compression, PP limitations... I can go on...?
I know exactly what I am doing behind the camera, and HDSLR footage looks great, for what it is. The newer model's coming out now A77, GH2 have all far exceeded what the 5dMkii is capable of but so far no other company has released a FF camera, which is so dearly beloved by all those idiotic indie film makers.
You clearly haven't been around in the video world very long.
The GH2, from what I can gather, is nowhere near something like a 5D2. Certainly, it has all the drawbacks that you mention in your previous sentence.
These limitations are few compared to the huge advantages that the current benchmark VDSLR's offer. Before VDSLR's, sensors were limited in size to the dimensions of a thumbnail, had horrendous noise and compression issues, terrible DOF control, and IQ was below iPhone camera level.
One cannot expect a VDSLR to have the capabilites of RED, or film. Nor do I imagine that you have the...errr....affording capability....of ever owning a RED. I am therefore surprised that you're sticking your neck out and saying how limited VDSLR's are.
A FF camera, although not an absolute requirement, has huge advantages over 1.6, "Micro four thirds" etc.
You can use cinema lenses more easily (as their length does not vary as with the smaller sensors)
The physical dimensions of a FF sensor allow more separation between pixels (less pixel density), meaning a cleaner image, better dynamic range etc etc.
Perhaps those 'idiotic indie film makers' have some merits to their decisions you have not yet considered (nor seem to be old enough or capable enough of considering).
This is of course a discussion on technicalities. Unfortunately the real issue that a lot of individuals who "think" they are capable filmmakers have, is that they "think" they are good filmmakers. A camera has very little to do with ability. I have seen beautiful short films shot on iPhone cameras, that put RED films to shame.