if you're asking how it does when connected to the TV using HDMI, the answer is: pretty well, but there's a trick that isn't obvious. Pressing ctrl-maximize switches between output modes (mirror, extended, etc) but a bug was introduced in the latest release. extended display mode works with most displays, or try rebooting with hdmi connected. hopefully they'll fix it soon.
short story long, it works about as well as most notebooks do when connecting to external displays (sometimes buggy but there's a way to make it work well), and it will get better.