Connecting a paypal account to twitter will make it easier to send money to friends or people, however, it will just cause more problems in the future. Twitter should stay as it is, the way people like it right now. Many people don't like change (such as like changes in facebook) so Twitter should just stay the same as it is right now.
It's absolutely ridiculous to see this picture from septermber 26th http://apod.nasa.gov/apod/ap090926.html
It really doesn't matter because apple can have a small screw up and still not be highly affected. Unlike PCs, where a small screw up can cause a dramatic change. People like simple more than complex which is exactly what they get with apple. It doesn't hurt that apple is immune to viruses either.