ET3D: It's not a problem on mobile only (although it's certainly severe there), but also on PC. Game value has dropped a lot, thanks to deep discounts and the huge number of games available. It's not rare to see people complaining that $10 is too much for a 10 hour game and they'd wait for a bundle, or sale or whatever. A lot of people feel that $20 is excessive for indie games. After all, you can buy Baldur's Gate for $10, or buy Skyrim for $5 on sale, and get hundreds of gaming hours.
The game market is a place where a few make big bucks and most lose money. I think that's true for creative markets in general, but the incredibly low game prices coupled with relatively high effort of producing a game, might make it more problematic than some other markets.
The costs of distribution the creative works are so incredibly low. Everyone with a decent computer and internet connection can download and play Skyrim nowadays and that for only $5 and it still leaves a profit for the developer. Why should people spend more money if obviously producing and distributing games is so incredibly cheap.
Maybe the world in general just doesn't need so many different game developers. Playing video games is just such an incredibly cheap hobby because millions of people play the very same games.
But then, interestingly, why is music or watching movies at cinemas or on mobiles not equally cheap or even free the way gaming is? They work with the same mechanisms (easy to produce, easy to distribute, all digital), so one would assume that they should have the same problems??
Maybe producing music or movies is still harder than making video games? Maybe consumers should pay for video games by time they play.
Maybe the way out (for the game industry) is renting video games out. Something like: first two hours free, then $0.1-$1 per hour depending on the length of the game.