With the recent addition of Penny Arcade Adventures: On the Rain Slick Precipice of Darkness there is a growing concern that larger and more costly games will be coming to XBLA. Rumor has it that the rumored Mega Man 9 may also just come to XBLA as downloadable content with no brick and mortar release.
Personally I'd rather own a disk than a file. The increased prices of DLC with no way to "resell" your "used" copy makes it difficult for me to rationalize a purchase.
What do you think?