But I actually think many game genres are getting less addictive. It used to be that distribution of games was so expensive that there was little money to be made without catering to the hardcore gamers (I use that loaded term to mean someone who is willing to spend huge amounts of time on a game)--so games often took forever to complete and were designed to be most fun if played in 5-hour chunks.
Now, with internet distribution and marketing, some indie game designer can design smaller games and sell them for $10. So there's a place in the market for smart games designed to be played in less time.
And, unlike the pusher-addict economics of social games, the low cost of distribution is win-win and not going away. Indeed, as it becomes easier and easier for a small team or single developer to make good games, this trend should only accelerate.