There is a thread about this on "Flyer Talk". They say there that all carry on electronics are now subject to additional "screening". I'm flying out of POP later this week and will report back.
I did receive an email yesterday from my airline notifying me of "additional security measures in place" and advising me to be at the airport 3 hours before flight time.
I remember that I flew out of POP shortly after the "underwear bomber" incident. They then also instituted "additional security measures". The POP security checkpoints were a complete cluster-Fk! People in line were pushing and shouting at each other. The A/P authorities seemed to make no effort to maintain control and order.
I hope it will be better organized this go round, but I planning to definitely being there at least 3 hours ahead. Best case scenario, I have time to finish the book I'm reading while sitting peacefully at the gate.