With noticeable improvements to page loading, pinch to zoom, and manipulating the tabbed “card stack” view, the only downside continues to be device availability. You already know that the technology behind Chrome for Android requires Ice Cream Sandwich to run, but there are reports that the update doesn’t work on some unofficial ICS builds, so the install base may get somewhat smaller with this update.
Finally, one user reported that it was working in Italy, so Android users outside of North America may want to give this a short to see if that is an isolated incident, or if Chrome for Android is rolling out to more international users.
Custom ICS ROM users tread carefully, but everyone else hit up the market link below to get the update.
sources: Android Market, Droid-Life