As first revealed during last night's Nintendo Direct, the 3DS is getting five game demos: Theatrhythm Final Fantasy, Metal Gear Solid Snake Eater 3D, Rhythm Thief & The Emperor's theatre, New Love Plus and Resident Evil: Revelations.
In this video, I showed off some of the game demos and talked a bit about how the in-game camera works on Resident Evil: Revelations and Metal Gear Solid: Snake Eater 3D.
The demos, however, are not unlimited. You can only boot them up 30 times. After that, they are lost to the sands of time. Poof!