Lots of Windows 10 news has been coming out lately, and a new technical preview build was also released yesterday.
http://blogs.windows.com/bloggingwindows/2015/03/18/windows-10-technical-preview-build-10041-now-available/
- Some of what's new:
- Improving the Start experience
- Improvements to Virtual Desktops
- Cortana is expanding into new markets on the desktop
- New network fly-out from the taskbar
- Enhancements to the Photos app
- New Text Input Canvas
- Experimenting with the Lock screen