I'm pretty sure you can do the same with Windows apps in Linux, since you can basically do the same with VirtualBox seamless mode too. It only requires installing the "guest additions" drivers - there's no container involved. The only major issues I see there are precisely with alt-tab - you cycle through your host windows, then suddenly ALL guest ones (and you're stuck in the guest until you press right Ctrl) - why is it so difficult to make alt-tab flow inside and outside the VM - at least in seamless mode?