Is this tv good for gaming and watching standard definition tv and gaming?

I Just bought that exact tv at bestbuy for less than 500 bucks. I use it for xbox 360 and watch hd channels, so far i'm loving it. Theres a feature in the settings menu to prevent burn ins and i havnt experice any burn ins even if i play xbox for 5 hours strait using hdmi. The only problem is that its 720p. Plasma is the best when it comes to texture but if your looking for smoothnest buy an LCD. Overall I give it 8.7/10