It's a Free, binary-compatible clone of WinNT. You can now run (old) Windows apps with no license fees paid to MS, and without any proprietary code on your system.
edit2: did I mention it's more secure by default than a normal desktop Windows install? WinNT has some pretty nice security mechanisms, if you use them right. As a trivial example, users aren't admins by default.
It's a Free, binary-compatible clone of WinNT. You can now run (old) Windows apps with no license fees paid to MS, and without any proprietary code on your system.
edit2: did I mention it's more secure by default than a normal desktop Windows install? WinNT has some pretty nice security mechanisms, if you use them right. As a trivial example, users aren't admins by default.