"So there's actually something inside this device to detect the type of TV and prevent it from working if it's not a Sony? I can't think of any essential feature a TV should have (other than an HDMI port) that, in its absence, would render this thing useless. If that's really what Sony's doing, dumb move"
Thought the same, but then I realised it is an MHL connection. It uses the same physical connector as HDMI, but has added features, such as providing the power needed by the dongle. It is meant to be used with smartphone too.
There are MHL adapters that may get this dongle to work, though it seems like too much trouble for something that is already more expensive than it should.