An article from CNET's Molly Wood entitled"Good-bye computer, Hello World" is a MUST READ for anyone looking out over the horizon.
She articulates and predicts CORRECTLY (IMO) where Google and other's will be taking the next "evolution" to...
Why? Because the pieces are all in place... Wired & Wireless broadband (Wimax,3G,etc),XUML or Ajax,every phone/cell phone/pda/device can connect to the net,Voice to text and Text to speech,etc.
True definition of convergence =What we want,when we want it,where we want it,how we want it.