Now that Google has launched Google Instant on its India domain as well, I was just thinking that it was of very little use to me personally.
I rely heavily on Google Deskbar (which has been discontinued by Google in a very unfortunate move) and Chrome address bar to search google (or others like ebay, wikipedia etc for that matter) and in both of these options, there is hardly any use of google instant.
Since Google Deskbar has been discontinued by Google, there is no point expecting the Instant feature to be integrated in it. But we have a "happening" Chrome address bar, and chrome is only getting better with time.
I expect Google will certainly add the instant search feature to the chrome address bar in the near future.