Cellphone railway booking for individuals ?

Imagine you need not have printouts of tickets, just show your e mail ticket to the TC and he will tick in his chart or if he is provided a blackberry, than he will click the travel confirmation on his gadget.  This would mean a huge saving of paper and cartridge ( maybe sales of some of the players may get hurt )  It was a dream cum true, i always used to grumble with the TC what is the use of ticket confirmation on the cell unless it is used for confirmation.  Now i am seeing the dream come true.