Fast, cheap and everywhere. This decent overview article on the indie game industry includes a list of fun examples with links to their home pages, which feature screenshots and downloadable demos. Also, a quoting accident:

PopCap and the online game portals have helped open up computer gaming to soccer moms worldwide. Popcap says that its average user is a 35-year-old women [sic]. RealOneArcade claims that over 50 percent of its audience is female and 85 percent over the age of 30.

"Our customers are playing to relax and unwind from the day to day grind. They don’t want to be reminded that they’re idiots or lack hand-eye coordination," [David Nixon, executive producer of RealOneArcade] explained.