i've been quite amazed these days. The game industry is moving on to digital distribution. Big changes the way casual games are evolving on the web. I found that idea of providing streamed based games very interesting. Episodic games are coming!

On gamasutra:

"Officials from Warner Bros. Interactive Entertainment have announced that the company will release its own video game tie-in to the forthcoming Watchmen movie, but as episodic downloadable content rather than a standard retail release."

Identifictions is another example:

The website www.identifiction.com will diffuse its videogames at a weekly rhythm. They are intended for adults seeking content that's original, irreverent, short (30/45 minutes) and easy to access from any operating system and a wide range of computers (pc, mac, windows, linux, etc.). The principle of Identifictions is that each episode is played live.
The decisions made in each episode will stay with the users throughout the series.

Amazing, short games!