I want extensions.
I use Chrome right now for Google Reader and that's about it. It's not my default browser; I don't have all my bookmarks ported in, I can't stumble or quickly add any pages to delicious, and opening tabs from Google Reader into Chrome is just a time-waster for me since I have to copy and paste the url into Firefox if I want to do anything further. Personally, I want the following add-ons:
--Clear Cache Button
--ColorZilla
--Delicious Bookmarks
--Faceboook Toolbar
--FaviconizeTab
--Forecastbar
--IE Tab
--Measure It
--MinimizeToTray
--PlainOldFavorites
--Read it Later
--Roboform
--Screen Grab
--StumbleUpon
Google has already announced eventual support for Chrome extensions, some of which include the ones mentioned above. Hopefully sooner than later, Google will announce a library for Chrome extensions and add-ons ready to be installed.