three `waves' of application

first wave: shared (remote) use of computers
telnet, email, ftp
second wave: client/server model, formatted lang.
web
third wave:  collaborative, peer-to-peer, interactive
napster, imesh, kazaa, gaming, video

emergence of third wave will require more real-time
interaction with and reaction to network status

the growth of these applications will be self-limiting
(by user frustration with performance) unless we have either:
a better grip on measurement 
either done by the applications themselves (e.g., vat) 
or via some other middleware aspect of the infrastructure)
or no service-affecting queueing anywhere in the network
(seems unlikely)