Burning a 24p DVD gives you several advantages -- it saves you an extra compression/conversion generation (assuming you shot in 24p, of course); it takes up 20% less space on the DVD; and (perhaps most importantly) it eliminates interlace artifacting on progressive displays, like a computer screen.

However, if all someone is going to do is watch it on computer, I'd suggest not burning a video DVD, but use Windows Media or something and burn it to DVD as a data file.