While it is no more dangerous than looking at the sun (which itself is not a good idea), the relative dimness is likely to tempt people to stare at the eclipse for too long, damaging their eyes.
While the Claro TV fights off the dimness so often associated with watching front-projection in broad daylight, and Planar's Xscreen claims to work without the gargantuous pricetag, now there's yet another firm in the mix of miracle-working screens.