XBox Originals is the brand name that Microsoft has given to last generation XBox games that it has made available for download on XBox Live Marketplace for the XBox360. See the official Microsoft webpages here: http://www.xbox.com/en-US/games/xboxoriginals/issues.htm.
Anyway, KOTOR is unlikely to become a XBox Original for two reasons:
(1) The Odyssey engine (used to make both KOTOR games) is rather unstable on the XBox360 and no one has a reasonable incentive to spend the money necessary to improve its performance.
(2) No LucasArts' owned properties have been released as XBox Originals to date.
James don't be ignorant. Mark politely corrected you and now you're just talking back. Xbox Originals are the proper name for Xbox games available for download on the Xbox 360 LIVE Marketplace. If he implied a standard xbox game, he would have said such. Instead, he used the proper name for a completely different product. You were wrong, don't argue >_>
If you can't dazzle them with brilliance, baffle them with bullcrap! "If he gets us killed in here I'm going to kill him." - Wrex from ME.