EA has announced that it will, in the very near future, be releasing game "demos" which will be monetised - to the tune of 10 - 15 dollars.
EA claims that 3-4 hours of gameplay (a possibly exaggerated figure) has a very high perceived value, and they will use the feedback from consumers of these "demos" to tweak and make changes to the final release.
While this may sound like EA will be using these monetised game demos in a positive way, it seems like they're simply making us pay them to beta-test their games.
Also note that their is no indication that purchasing the "demo" will get you any kind of a discount on the final, full game. So expect to pay twice.