One year though, is found mostly on under $2000 home projectors. This BenQ, and the Panasonic PT-AE3000 are the primary exceptions (over $2000), and Panasonic often runs a free extra year warranty as a rebate.
I'll recommend picking up a 3rd party extended warranty if you buy a W6000. They are typically under $100. A factory warranty is going to be easier (to deal with) than a 3rd party warranty, if you have a problem, but, hey, you aren't likely to need either.
Bottom line: While repairs on home theater projectors are pretty infrequent, they tend to be expensive. I always recommend that everyone have two years of coverage.