The X-Wing Alliance Upgrade Project is a graphical update to the Lucasarts flight sim X-Wing Alliance. This, combined with other mods, will allow you to play through X-Wing, Tie Fighter, X-wing Vs. Tie Fighter, and X-wing Alliance with upgraded graphics, and improved gameplay mechanics. Other customized missions can be found onder the "addon" section.
Comparing Totally Games' Model (top) with Darksabers and Decoys version (bottom).
On the subject of tie fighters -- will the prototype ones from the campaign be made to look more experimental? I mean they did certainly look like deviations from the norm but since this is an HD version then maybe some added graphical distinction could be added?
Oh don't worry, there are several new crazy "experimental" Tie variants, as well as updated versions of the origional five variants. :P You will see more about the Tie experiments in the next few days. >:)