So far as I can tell your laptop does not have WiDi (and to be honest, most don't). The simplest answer is to get an HDMI plug and plug your laptop into your TV. The less simple answer is to go out and get a WiDi adapter which will set you back ~$70 and use that to stream video to your TV.
WiDi, Miracast, and other solutions are pretty sweet, and I can't wait to see more adoption of them (especially in tablets and cell phones for wireless docking capability!), but the tech has been slow to see mass adoption because it is frankly a bit expensive to implement. I am not sure why Intel makes the cost of it's own products like WiDi and Lightpeak/Thunderbolt so expensive, but it is really holding things back for everyone.