Latency was tolerable, but I wouldn't want to use this to send anything with a resolution higher than 1920x1080, as the video was often a fraction of a second behind the audio in my experience. To get around this, I would be plugged in to ethernet for a network and use the WiFi just to broadcast the images. One limit of this software is that while using it you temporarily lose Wifi Internet connectivity. Before classroom lectures all moved online, I would use this to broadcast notes and slides from a ThinkPad to a big TV via WiFi. This was the first Miracast implementation for Ubuntu that I learned about a couple of years back and it still sees regular updates from the developers. You'll need to test, and I'm sure the developers would love to hear any feedback you have from the experience. That said, theoretically it may work with Windows10. The app is still considered 'experimental', and the tested devices list is pretty slim.

You can easily install it via the Flatpak system. This is probably the one that will gain the widest adoption given the number of developers and advantages it has over the alternatives. There are two projects that are actively updated, but neither are ready for prime time: Gnome Network Displays Ubuntu, as of this writing, does not have a simple means of using Miracast.

Windows 10 can be both a source and a sink to other Miracast devices. This allows 'source' devices such as laptops, tablets, and smartphones to send a video stream to 'sink' paired display receivers such as TV, monitor, projector, or another computer that is Miracast compliant. Windows10 notebooks can act as an external monitor wirelessly using the Miracast standard. This probably won't count as an answer, because I can't give you a complete step-by-step on how to accomplish this, but what you're looking for is theoretically possible if you don't mind compiling source code and working with development teams to sort out the occasional issue.

Laptop miracast windows 10