Heh, in chennai, owing to hot and hotter climates, not only yu have to pay for the current, but also for tonnes of water a month.
I understand that this is different from the other technology where you just project images onto a sheet of water. Really ingenious idea, if what I presume is correct, but totally impractical as I see it. I don't think color displays are feasible tho, as mixing the right color to the right droplet would take a lot more time. Also, I expect the pixel size to be too large to pass as a good display.