Nope. It's because gaming has become a bloated industry, and easier games mean more people can play them. For example:
http://www.youtube.com/watch?v=RULv6HbgEjY
Some games are still catered to provide a challenge though. Apparently Bioshock: Infinite has a "1999" mode, which will provide a challenge similar to the good old days of System Shock and Deus Ex. My body is ready.