The height of this market happened perhaps in 1996 shortly after IBM paid what seemed at the time, a ridiculous price for Lotus and its Notes product. During this time, it had been realized that there were vast fortunes to be saved by helping people to work together better. It was all about HTML and Javascript and applets and back to the world of thin-client computing. CSCW had been dropped as an area of big interest. And it's back at the forefront of importance.
Humans are for the most part social creatures.
In order to deliver these compelling features, applications need to understand the Affinity Groups that people move in, and in order to do that we need to gain a deeper and broader understanding of how to deliver collaborative and cooperative applications, whilst achieving this on screens the size of oversized postage stamps.