The last version of Windows 10 Mobile is too buggy to be released to Slow ring, Microsoft announced last month. The Redmond-based company is now working on build 10134, which hasn't been released to Fast ring yet due to an issue that hasn't been fixed yet.
Gabe Aul recently offered a hint on how the work was progressing and it looks like all is well. Even though Microsoft had a couple of issues that needed to be fixed to allow a smooth upgrade from 10080, it appears that these have been addressed.
Until then though, it looks like the folks over at WPXAP have just published a comparison video that shows some of the differences between the unreleased Windows 10 Mobile build 10134 and a previous Technical Preview version.
The first one that you will notice is the revamped Search function, which is now a search bar instead of an icon. Also, the swipe gesture now allows users to browse through People, Phone and Alarms/Clock apps.
The non-universal applications are now accessible through Store Beta and users with Windows Phones that pack HD (720p) displays and above can now set tablet/PC UI for Settings in landscape orientation.
Last but not least, Windows 10 Mobile build 10134 seems to be stable enough to be used as a daily driver, but the risk of bricking your phone still remains. You can watch the full 4-minute video right here.