Twitter will be fine. Twitter won’t be the holy grail to solving all your problems – whatever they are.
The now and future of communications is (& has been for a while) fragmentation. People want to communicate when, where & how they want to – and they all want to do it differently.
Everyone needs to stop looking for TV’s replacement, the era of TV and the mass communication is dying. There wont be a ‘next big thing’ in communications… There will only be ‘lots of medium things’.