Like most people have said, to me the chrome approach is the right one to follow. Most average users don't bother with upgrades. I have come across various people complaining why a website would look differently if they view it from their laptop, only to find out that their laptops had IE6 installed.

The major issue with using latest web technologies has always been browser support. Fortunately enough, Google has find its way to speed up internet technology growth. Other browser vendors should no doubt follow a similar approach.