One of the lovely accidental insights provided by the "deleted scenes" found on many DVDs is a little window into what a movie looks like in its unfinished form. Often these extras are dumped directly from an Avid, where they have temp sound, no music, and usually a one-light telecine transfer. In other words, little or no color correction.
Seeing how rough a multi-million-dollar studio film looks in its formative stages is a great inspiration to the DV Rebel. It reminds us that a great deal of what makes a movie feel "big" comes in the finishing and polishing stages—specifically the sound mix and the color grading.
Remember, you may not be able to hire stars or secure expensive locations, but you can apply high-quality color correction (and sound work) to your movie using inexpensive desktop tools. You just have to be willing to put the time in.
EDIT: Be sure to read the comments on this post! They expand nicely on the topic.