feeling listless

Film The 10 Most Regrettably Missing Movie Scenes of All Time aren't even available on dvd. In the case of the Star Wars scene, though, you can see why it was omitted -- that would have slowed the pacing at the top end of the film down rather a lot:

"Woven into the movie’s opening shots of R2-D2 and C-3PO escaping the Empire’s forces and crashing on Tatooine, the Tosche scenes show Luke gazing at the space battle above and chatting with his friend Biggs Darklighter, who tells Luke just why teenagers on some pissant desert world should join an intergalactic rebellion."

See also: Scene Unseen, particularly.