I think the Surface Pro's don't have a full-size HDMI port, so you might have to buy a mini display port to HDMI cable in order to connect your "2nd monitor".
If you don't want cabling it depends on if you have a smart tv or if you need a roku/chromecast to screen mirror to an older tv. To do these options you have to connect to a wireless display and extend your desktop - it's not very stable wirelessly though...
|