The older browsers were improved by many browsers attempted to have a new face. Those browsers worked, but not updated.

Google toolbar do the same and can be updated fairly easily.

If IE6.0 is obsoleted, Google toolbar can upgrade it with virtualization and firewall and extensions of spellcheck and other conveniences. Google toolbar already can speed up ISP data transfer by frame size adaptation from history of web pages.

Then again Google Ajax websites can do database, spreadsheet and word processing.

Google must however have failsafe and redundant computers. Which means, they are going to add more computers with raid and redundancy of terabyte hdds?