My vote is "no"
1) There is no good place for it. Putting it in the lid would require adding space around it with a larger bezel. I would prefer as small a bezel as practical. The back of the case also has little room due to many connectors planned.
2) No way to match good quality cellphones for a rear-facing camera. As has been mentioned, good cellphone cameras have very advanced proprietary drivers to correct for the hardware limitations. ED cannot afford these development costs.
3) Security. Pyra will sell to geeks, many who work in IT areas which have camera restrictions.
4) Reliability / RMAs. Another point of failure.
5) Additional cost even without custom DSP processing. Adding a camera would require sourcing one with linux drivers and integrating it into the Pyra firmware. Somebody has to do the work and I am not sure the team has someone who can handle the work.
While it is possible a solution for a front-facing cam in the hinge to be found, I feel it wont be easy, cheap and worth the trouble.