Based on the above questions - I actually think that SONY may be on the right track.
1) They have created modular screens that (sort of like Lego) can be used to make a seamless wall.
Each module is physically manageable, only handling 360x360 pixels.
2) Their research found that when the eye sees 'pin pricks' of light, the there is much larger 'halo' perceived as a pixel by people.
Sony's pixels in each module are 99% pure light-absorbing black, with a miniscule light emitting area that only uses 1% of the central pixel area.
The result is very high contrast in high ambient light environments.
3) Their current modules Do currently have fans in them (ie not completely silent). The pinpricks of light are also not yet P3+ gamut.
Having only used projectors in my household for almost two decades - It may well be that my next dream system is one not unlike what Sony are developing.