Chrome for Windows enters 64-bit era, with more speed and security | PCWorld:
"Because of improved compilers and the way that the browser handles function parameters, users should notice a speedup of about 25 percent, specifically in running Web-based applications. Security should be increased as well, he wrote. Finally, even through the browser is being released on developer channels, Harris wrote that data has shown that the 64-bit version of Chrome is even more stable than the 32-bit version; “crash rates for the renderer process (i.e. web content process) are almost half that of 32-bit Chrome,”
While the Chrome browser is moving into the 64-bit generation, Google's Chrome OS—which is little more than a browser itself—actually moved into the 64-bit space a while back, as did Chrome for Linux"