From a competitor's standpoint, there is a different, yet similar product from WoWee, that we plan to review but don't know its warranty as of this writing. The much larger and heavier (9.5 pounds) Epson all-in-one MovieMate projectors come with 2 year warranties, but Epson tends to be a market leader in warranties. All their projectors have two years, and most have a replacement program.
I think of the Optoma Neo-i as sort of a boom box with projector , and that kind of perspective has you seeing products mostly with those 90 day warranties. A thumbs up for Optoma, in terms of warranty.