Emerging new applications

Monitoring
Taxicabs/vehicles as distributed sensors
Wiper switch = rain sensor
Additional services
Coffee shops/hotels connected to the net 24x7, with 802.11
Supply additional services (like wireless Internet accesses) to attract customers
Peer-to-peer
Gaming/chat servers are suffering from excessive load due to client-client communication, resulting in giant server farms
If clients can communicate directly with each other, server could become smaller
With NAT, we can't do it/doesn't scale
Kill legacy service appliances
Make cellphone a simple VoIP device, no need to deploy proprietary cellphone switches = reduced cost