This is really great on several levels. First of all, I do think the ability to run Linux GUI applications almost natively on Windows is a good thing. Especially, as this ability ships with Windows without having to manually set up a virtualization. This reduced the bareer of running these applications a lot and hopefully this gives incentive to write more Linux GUI applications with the increased audience.
It is of course fantastic for all, who would like to use Linux but are tied to Windows for various reasons. For some use cases, one still would use a classical virtualization like VMware, but for many others, this is an elegant alternative.
It is also good for a pure Linux world, as to my understanding, this is most of all an enhancement of the RDP support for Wayland, basically solving the problem of lacking network transparency. It was a valid critizism of Wayland, that unlike X it didn't have a concept of network transparency. But with all the work done by Microsoft - and it seems to be completely open source - this problem looks to me as solved. Perhaps even better than with X, as RDP is designed to be forwarded over larger distances, while X forwarding is most useful in local networks.
It is of course fantastic for all, who would like to use Linux but are tied to Windows for various reasons. For some use cases, one still would use a classical virtualization like VMware, but for many others, this is an elegant alternative.
It is also good for a pure Linux world, as to my understanding, this is most of all an enhancement of the RDP support for Wayland, basically solving the problem of lacking network transparency. It was a valid critizism of Wayland, that unlike X it didn't have a concept of network transparency. But with all the work done by Microsoft - and it seems to be completely open source - this problem looks to me as solved. Perhaps even better than with X, as RDP is designed to be forwarded over larger distances, while X forwarding is most useful in local networks.