The criticisms seem valid, but I'm surprised by the extreme negative reactions. VCs have a lot of money to play with, which they usually pump into the latest photo sharing/email organizer/whatever app. I'd prefer mistakes like this to getting more yo like apps funded.

Plus, who knows. we will probably never have ultrasonic iPhone chargers but maybe ubeam will pivot or stumble upon other unrelated ideas or uses for their technology, as often seems to happen with startups.