I want to install my Raspberry Pi in my car.
I also want to have a screen visible for the driver while the RPi is somewhere else.
So i want to extend it up to 50cm, is that possible?
I think you can extend it to some length, if 50cm is within that range I don't know, you should try that. But the specification of the bare protocol look promising:
There are already (or soon will be) displays available for this port, with (rumours) touch screen support. The chance of getting some other display to work is at this moment not very high, extending the cable for that special RPi display is a nice test to perform.
If you did tests with this, I hope you'll be so kind to share the results with us.