That's the reason why there are many people waiting for new features and versions. They are looking forward to try new things on their favorite web browser.
Google Chrome Dev grants you the opportunity to use the version that developers are working on. All new features are there, although it may crash.
All those featurees you enjot nowadays on Gogle chrome were previuously tested on Google Chrome Dev versions.
You choose, but take in mind that it is a development version and that means it is not as stable as the final version.