RE the advice to just use a digital TV: Aren't they all pretty much 1920 x 1080? Or about 2MP equivalent. Are the 4K ones any higher? I was thinking of something that will display the full resolution of the D700, if not the M9. I see a Sony projector with 4096 x 2160 displays, which I believe must be equivalent to 8.8MP resolution. That's not 12 or 18MP, but perhaps good enough. And I do have an 8 foot wide screen.
May the light be with you.