Although several firms are experimenting with transparent LCDs, it looks like Samsung is the first to put the technology into mass production. TechEye is reporting that Samsung's transparent 22" panels will roll off the production line in color and black-and-white flavors. Few details are available on the screens themselves, but we know they'll have 1680x1050 resolutions and a 500:1 contrast ratios.
Advertising is pegged as the most likely application for the initial batch of displays. There's no word yet on how expensive the first see-through offerings will be, but as with most things, prices should fall over time. Since they don't require a backlight, transparent LCDs are expected to become cheaper than traditional screens eventually. You probably won't be able to read them in the dark, though.
Transparent LCD technology sure sounds neat, but it's hard to imagine a compelling usage scenario for PCs, be they desktops or mobile systems. There's rarely anything behind my LCD that I really want to see. At the same time, I could really use 1680x1050 pixels worth of display capability on my windshield.