Did you look at the specs of that unit? 5 watts of blue. Only 4 watts of red, and at 650 nm to boot. The color-balanced output of that projector is probably somewhere around 10 watts maximum.
A single 15 watt Krypton-Argon mixed gas ion laser will have a higher balanced color output *and* superior color blending when compared to that "20 watt" projector.
Oh really? And what market forces, exactly, are at work to make this happen? Computers are *not* a valid analogy. They got smaller and cheaper because they're used in damn near everything these days. (And for the record, mainframe computers are not even close to extinct... Do your homework. Mainframe sales have actually INCREASED in the last decade.)the price of DPSS will continue to go down, diodes will get more powerful and large frames will eventually become extinct just like mainframe computers in business did.
Bottom line - lasers above 5 watts have *very* limited uses, and most of them can be met with existing Yag and DPSS green technology. So there is no "killer app" driving the development of a 20 watt DPSS blue, or a 20 watt solid state red. And without a killer app, no one is going to spend the money to develop one.
Adam