I don't like the sound of this...
There's definitely an issue game companies face when it comes to rising development costs. The problem is that few consumers are willing to pay $100+ for a single game, so game prices really can't go up even as the cost of making them does. Video games are already one of the if not the highest priced media, so people would be more inclined to buy more movies, music, books, etc. if games started costing more. Plus, I'm not convinced that most people are willing to spend $60 on most games, seeing how fast they drop (myself, I could probably use my fingers to count the number of Wii games I spent the full $50 on). Games may cost a lot to develop but that doesn't make the value to the consumer go up.
There has to be a better solution than nickel and diming people using DLC. The whole thing seems undermining and controlling on the part of publishers. Personally, I think that companies should just produce less games. There shouldn't be a reason for any one system to have thousands of games available, especially when a small fraction of them are actually on store shelves at one time (and that a majority of them are probably junk, but that may not be something which can be proven as quality is partly subjective). Less games selling more copies equals more profits. I know that wouldn't be an easy thing to do, but looking at the number of developers who closed up shop in recent years, something needs to be done. That something just needs to be good for consumers and companies alike.