The Linux "apps" will essentially run the distro through a compatibility layer. Users will have access to Bash and the Linux command line.
http://www.notebookcheck.net/Ubuntu-available-in-the-Windows-Store-SUSE-and-Fedora-to-come-soon.220602.0.html
Too bad Windows 10 is spyware and should be banned across the globe, just use Linux by itself instead of being a moron.