Watching TV on your phone is possible since a few years, but the new Nokia DVB-H headset makes it a lot easier. The headset works as an antenna that can receive TV-signal while you're travelling.
The headset works with the Nokia N8, that has been released lately, among other handsets, and will be costing 40 euros. Unfortunately, you'll need an extra contract for mobile TV in many countries. The service has only gained some popularity in Japan and Korea.