No, it's not what you think. Everyone knows already that they can read or listen to music or review documents with their PDAs during that bus wait.
Some young inventors from a university in Malaysia have submitted an invention to the Philips Young Inventors Challenge. The idea is to add functionality to your PDA so that when you enter the bus route, the PDA notifies you if your bus is approaching. No indication of whether or not it also tells you when you are approaching your stop, or whether it notifies the driver he should stop for you.
The idea makes a lot of sense to me... You can now watch a movie on your PDA in peace, without checking the sign on every bus that passes to see if it's yours. And the advance warning should give you just enough time to put away those earbuds, stop your movie, and put the PDA away in your pocket before you jump on the bus!
More info at The Star Online