This is your only choice for a webcam, for Skype, for your Sony Internet TV (check compatibility before ordering). It can also be used as a regular webcam on a computer.
This small cam/mic is about 6 inches long and 3/4 inch wide. The mounting instructions are pretty much incomprehensible. Once I ignored the helpful little pictures, I was able to get it stuck to the top of my TV. A product at this price point might be expected to have a better mounting system, e.g. a matching peg system that better mates the webcam to the TV. Once you have it stuck to the TV, plug it into the USB port on the TV and you're good to go. Just fire up the Skype app, found under "Internet Video" on your Sony TV remote. You will not be able to text message nor will you be able to send files using the internal TV app, but you may not need to do either. In a typical family room/entertainment room setup, you won't.
If you are using the TV as a computer monitor, as I am, you can plug the Sony webcam into a USB slot on your computer and use the regular Skype app in Windows or iOS (where you are able to select the microphone array under Tools/Options/Audio Settings).
This is a good product for its intended use, and I see that it is approaching a reasonable price after a number of price reductions. If you are looking to maintain the look and feel of your TV, it does the trick. Picture quality and the microphone array are very good, although I would wish for a less wide-angle view. It's great to have Skype video on the "big screen."
I sit about 4 feet from the screen and I find myself to appear on the smallish side due to the wide angle lens. If you were 15 feet away, I fear you might be a mere speck, but that is not my setup and you should look to other reviews on this point. It would do a good job of getting the whole family into the picture, and I guess that is the trade-off.
I use my Sony 32" Bravia Internet TV as a computer monitor, and I use this Sony webcam as a computer webcam (i.e. plugged into the computer's USB port, not the port on the TV). That is pretty much plug and play as well - you just have to go into Tools/Options/Audio in Skype to set the microphone to the microphone array in the Webcam if you wish to use that (mic quality is excellent).
If you decide, as I did, that you don't need to actually plug the webcam into your TV, your choices widen considerably and the price point falls. Here is a 4 1/2 star Logitech 720p webcam sold on Amazon that sells for $40 and uses Zeiss glass. It appears that product would be easy to mount with Velcro to the back of your TV/monitor, but it must be plugged into a computer, NOT the back of a Sony Internet TV:
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Summary: This is a snazzy webcam with a crisp picture and a great mic (a 4-mic array) that you can plug into certain Sony internet TV's. It's a bit pricey and the wide angle view may not be ideal for all settings. You can also plug it into your computer and use it like any other webcam, in which case there are other, less expensive choices. It's your only choice if you want to run Skype video on your Sony Internet TV using the built in USB connector and Skype application. That built-in Skype app is easy to use. You may find the process of attaching it to the top (or bottom) of your TV to be annoying, as the visual instructions are unclear.