Sony just announced the Alpha 7R, a 36 megapixel full-frame camera without an anti-aliasing filter. This immediately brings to mind the Nikon D800E, which also has a 36 megapixel full-frame sensor (made by Sony, if I'm not mistaken) and does not include an anti-aliasing filter. Yes, this same D800E that rivals most medium-format digital.
What separates the Sony Alpha 7R from the Nikon D800E is size and price. The Sony model is not a DSLR, but a compact interchangeable-lens camera. I don't think it will fit in a pocket, but it is much smaller and lighter than the Nikon. It also retails for about $700 less.
Honestly, if I were in the market for a full-frame camera, I'd have to take a long look at the Alpha 7R. This might end up being the best full-frame camera out there (we will have to see once people start using it). And it is a good size and weight and not too expensive.
The Sony Alpha 7R should be in stores in late November.