Canada is planning to go plastic with their bank currency notes! I have been waiting for some country to start this trend for so long. It makes much sense to have plastic money which is basically indestructible as well as much more difficult to counterfeit. Also, in India after the pan wallas and parking wallas have gotten a hold of that paper money it goes through a lot to remain in shape and stinks up your wallet if you receive it.
Plastic would definitely solve all these issues and make money last much longer in a better condition. Though we'll loose the crispiness of freshly printed cash from the bank!