According to a News.com article, Vonage is now testing new routers which will free VoIP subscribers from computers and landlines:

With the special router and handset, individual customers would be free to roam about their home or office, untethered from a modem or phone jack and without a connection to a laptop or desktop computer.

This is the equivalent to having a wireless handset that you probably already have in your house except that the phone is automatically routing the calls over the internet rather than a phone line (but you don’t need to be tethered to a computer with internet connection). This means you can buy one for grandma.

Already in Asia, you can buy cellphones with WiFi so that you can make cell calls over an internet connection rather than using precious minutes. Only a matter of time before cellular goes the way of the Dodo. Time to evolve people (that means you have to stop dragging your knuckles now).