People without fast internet, or even worse, no internet are being overlooked. 23% of people in the U.S. still don't have internet access as of 2010. That's quite a few people. And that doesn't even include high speed. Broadband usage in the U.S. is only around 22% as of 2009.
info from http://www.internetworldstats.com/am/us.htm
I had bad internet for 6 years when I lived somewhere that was newly developed and didn't have broadband availability. I know how crappy it is to not be able to get the updates to play games on XBL - let alone DLC. It sucks, but hopefully in ten years or so, it won't be an issue for most people anymore.