See the picture above of the "Storefront" rack? It doesn't hold many, right? That's not a big deal, IMO, because if you look at the numbers in the above link, you see that the top 10 sellers made up 77% of the sales of the top 30. So, it won't take too many different pre-burned movie titles to fairly effectively compete with the off-the shelf racks!
What this means is that until the content is expanded to include the really long tail, which can double revs, Titlematch should still be able to attract the eyes of the consumer and the pocketbook as long IF allowed by the studios to sell the hot items, and as long as they keep those Storefront shelves stocked!
Edit: Licensing has yet to be announced by big studios except Sony/HP, and we don't know yet what will be allowed to be sold, so at this point it is only one more POTENTIALLY great thing for PCLI.