If you only saw it dead on, you would swear it was Sony's best Plasma. Except aint no one got a 70" plasma yet. I have been yelled at twice for watching it instead of working now.
Rear projection is currently the best way to get the best medium sized image (65-84"). for a 70" image, nothing else except front projection can even create the image (there are some exceptions). Front projection is useless with ambiant light if you are looking for a quality image. With even moderate room lighting, a 84" front projector had better have 5000 lumens or it will not look anywhere near as bright as the average TV. Until Plasmas and LCDs are capable of getting bigger for less money, rear projection will be the best option.
You should have seen the 8,000 lumen, 120" rear projection system we did for a customer. (thumb)