I dont think that Saree will be expired, yes it will be a change to less wearing but that will be for downtown girl. After all India still be a country that culture and custom is a way of life. As long as people stay with they culture saree will be stay close to them also.
Further more is the fact that Indian designer in every era has been applied the desh fasion alway on time or era. Saree is also going on the new fasion all the time. Who know in new age you may see Mini Saree (shorter saree).