INPASS requires you to have a valid passport. Only around 10% of the population has a valid passport. I doubt the passport office is up to speed to handle the increassed number of applications. The other problem is it takes time even with INPASS to verify who you are--and then you will need to have your bags checked. The whole process would just take more time. If they want to let people through with "smart" cards without checking their carry-on, they are only asking for more trouble.

Why not just do away with security lines and let people bring on board whatever they want. Think of the time savings. Not knowing if your fellow passenger is carrying a firearm would keep most people in line.