With the front-facing camera on the Evo, I think it might be feasible for the phone to do "head-tracking" (i.e. know where your eyes are in relation to the phone).
If it is possible, then 3d games on the Evo should be able to be made. This is the same kind of concept that the upcoming Nintendo 3DS handheld is rumored to use.
Here's an example of what I'm talking about using the Wii.
YouTube - Head Tracking for Desktop VR Displays using the WiiRemote
If it is possible, then 3d games on the Evo should be able to be made. This is the same kind of concept that the upcoming Nintendo 3DS handheld is rumored to use.
Here's an example of what I'm talking about using the Wii.
YouTube - Head Tracking for Desktop VR Displays using the WiiRemote