ive never had great luck using the browser. i actually dont get espn, thats kind of the point. i dont know if its worth getting appletv but that seems to be what everyone says to do. i dont know if i care that much and still dont really understand what appletv is.
I don't subscribe to any cable/satellite anymore. Basically, you can use an Apple TV to access some apps, purchase/rent movies and tv shows, etc.
But, where Apple TV really is awesome is using AirPlay. Basically, you can airplay anything on your iPhone, iMac, Macbook or iPad to your TV. It's like hooking up an HDMI cable from your TV to your device, but it does it all though your wireless.
For the game tonight for example, you would find your stream on the Mac then airplay the desktop to your TV. You would see and hear it just like you were sitting in front of your computer.