> 2 OS targets

Well yeah..

Edit: I would like to add that I checked out the GH and it seems like a really cool project, hence it's a shame that the website did not reflect that.

But they are not for you! They apparently help to appear on the HN frontpage.

And probably also winning some ~sponsor~ investor money.

On first look of the linked talk/demo, the German guy behind the project seems of legit DRM-background expertise.

It’s a debugging/reverse engineering tool. It emulates user space, so it can control/introspect the target processes to the same level that a kernel-level debugger could, but in user space.

To answer your actual question, it does both. It emulates both windows and linux (although linux implementation was done by a contributor and it's probably not as evolved as the windows part). It also does so on every platform, so you can emulate windows on your android/ios phone, even on the web. It cross compiles to pretty much every platform.

It supports various emulation backends, e.g. Unicorn (which uses QEMU under the hood), but also Hyper-V on windows. That's where the sandboxing part comes in to play: As Hyper-V is pretty fast, the emulator starts turning into a sandbox.

Maybe some day I can add KVM support so you can run sandboxed Windows apps on Linux, but I haven't had the time yet. So at the moment, only the slow emulation backends work on Linux.