I hate to say it, but I think the 516s (or whatever wavelength they end up at) are not going to live up to the excitement we're hoping for.
- they're going to peg in around 100mw
- they'll be less visible than 532s, so that 100mw will look more like 75mw of 532
- the color isn't far off from 532
Don't get me wrong, I'll certainly build one when the diodes hit. But I don't think a 100mW 515nm will be as exciting as the ~500mW 638nm diodes that should hit around the same time (and potentially in the same projectors). In terms of giving us something really mind blowing, I think the high power, low wavelength reds will be more exciting. More visible red beams - that excites me