The application used in Ubuntu systems to write ISOs to USB disks, the Startup Creator, is being redesigned and rebuilt for Ubuntu 16.04 LTS (Xenial Xerus).
The Startup Disk Creator has been ignored for the past few cycles, but that’s about to change with Ubuntu 16.04 LTS. Developers are now working on designing and building a new one based on QML, which should be much more flexible and, more importantly, supported and maintained.
the new USB Startup Creator should be able to write more than just Ubuntu or Ubuntu-based images, which is actually a great idea since there are few applications of this kind in the Linux ecosystem. Sure, there are some handy terminal commands, but not a lot with nice GUI and easy to use.