I know I'm new here, but I'm going to throw in my two cents anyway.
Aside from yourself personally, what types of games do most people play?
Think on it. Do most people spend time playing $5.99 downloaded games on an ipad or psp? Or do most people play games on the web? Here's a relative example: Do most people listen to the radio and put up with the ads or do most go out of their way to pay for XM satellite radio?
First off...to play games on a droid, ipad or psp you have to actually have one. You have to go out and spend $200+.
But web based games require a computer (which essentially everyone has or can get access to) and an internet connection.
If there is any question as to whether people play web based games, I can pretty much guarantee more people have played Mafia Wars, Farmville, Castle Age and the other countless web based time wasters than all of those downloadable apps for different systems...especially since they are free to play.
So, take your pick.
I, for one, am like the vast majority. I like free entertainment. And if I do pay for a game it will likely be the newest Zelda or Final Fantasy game...probably not an indie developed app without viral features.
And that is why, in my opinion, that despite the new, cool gadgets released every 2 minutes, the internet will always be a viable contender.