One of my favorite features is forehead-slapping simple--"create application shortcuts". This creates shortcut icons on the desktop, start menu or quick-launch bar of Windows for the current site. But these shortcuts don't just open a browser window. Rather, they open in a seemingly "browserless" window that makes web-based apps and Web 2.0 services look and feel more like traditional desktop-based software. Do this for sites like Picnik and Gliffy, along with Google apps like gmail, docs, calendar, sites, reader, iGoogle, Blogger, etc., and you've basically got a fully-functional computer that, as long as you have an internet connection, requires no other software than an operating system and Chrome.
While I suspect only early-adopters and keen web developers have begun using it so far, I predict that future releases and word of mouth will garner Chrome a marketshare that rivals or suprasses Firefox and other popular browsers. I can't wait for the Mac and Linux versions of Chrome to be released soon.