The release of Halo 4 may still be a long way off, but Microsoft isn't about to let fans of the series go without some sort of tidbit to keep them interested in the meantime.
To that end, the developers of Halo 4, 343 Industries, have released a new theme for the Xbox 360 dashboard which costs 240 MS Points, or $3.
You won't be able to pick the theme through the store right away, though, as Microsoft wants you to jump through a couple of hoops before you can get to it. To start things off, you'll have to go over to the Halo Waypoint website on your Xbox 360. Once you're on the site, head all the way to the bottom left of the Waypoint dashboard to enter the Store. Select "Themes & Pics" from the menu and you'll see "Halo 4 Concept Art Premium Theme" listed as soon as you enter.
You can check out what the theme looks like here.