If you can't watch movies on Vudu at the same time as they're in theaters, then that point is sort of moot. If Vudu gets movies at the same time as they're available to everyone on DVD and BluRay, you can compare to renting at Blockbuster or buying the title outright.

If I could stream a movie on the day in opens in the theaters for $6 then I'd probably do that quite a few times over the course of the year.

I can buy a used DVD for $2, watch the movie and then sell it for $3. Profit of $1.