To pick an epicurean example, your already microprocessor-equipped toaster may help crack large prime numbers or predict the weather (between toasting slices of bread :-). It could even be connected to the Internet though the AC power wall outlet. Power companies already figure IPv6 has enough addresses that every light bulb on earth could be connected to the Internet....
One may simply ask the network (from one's pager-sized communicator or wristwatch) to perform a task and have it completed through user-intangible collaboration of resources somewhere on the net.A related possibility is that smarter file servers speaking in a language of networked data may be the only distinct back end hardware in the future.