On desktop, Google offers three "channels" for Chrome, its WebKit-based browser: stable, beta and development. Previously, only the stable version was available via Google Play, but now users can try their luck with the latest beta if they're keen to see what's coming down the pipeline.
Despite being released only two days ago, Chrome Beta has already moved into the 10,000-50,000 downloads range and even with the beta proviso, it's averaging 4/5 stars in the review stakes. If you're worried that installing the beta might damage the stable version on your Android phone, then there's good news — you can have both on your device at the same time.
At the time of writing, the stable Chrome was last updated on November 28 last year, though if it's working well there's no need for Google to update it that often. Still, I understand the need for having the most up-to-date software installed — I check for new drivers for my notebook at least once a week — so knowing Chrome Beta is a few taps away must be comforting.