As have been done with older versions of games (Banjo-Kazoie, Perfect Dark) the first installment of the Halo franchise will be getting a current-generation re-rendering.
This winter, Halo: Combat Evolved will be released on the Xbox 360 arcade with upgraded visuals and a reworked control scheme. The re-release is supposedly going to be compatible on 3D TVs.
No word yet on pricing, but Halo: CE is expected to land on November 15 2011, exactly a decade since Xboxians first stepped foot into Spartan combat armor.
Something to point out: Bungie, the developers that created the Halo franchise, are not working on this project at all.