Possibly a touch interface
Agree that the flexi printed conenctors are long, though they could simply be designed to wrap around the PCB underneath should their destination happen to be situated in an inconvenient location. They also have the advantage of reduced risk of damage via being stressed during assembly.
The lower cable could easily be for the backlight however. As the LED current is not transmitted though the glass, it may be better to have that circuit entirely separate, especially if the power supply for it is situated well away from whatever generates the picture data (as on the Sony PSP for example).
Lastly, the picture data bus appears to be serial. Given the apparent large pixel count, that would make for a pretty slow frame rate, so I would guess this is not meant to display video, but rather static annunciators.