I must be dense, but I'm not seeing how this is going to help in making TVs and projectors. The diode-pumped green lasers we already have are not that expensive (about $100, I think), so they would not add much to the cost.
The real problem seems like it would be brightness: you need a really bright laser to scan over that large 54" area and still remain bright to the eye. But the green lasers we have are already plenty bright. I think it's easier to get a bright "fake" green laser diode than a bright red one.