fast RPI screen display without remote desktop

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I have been playing with uv4l which has a RPI Hdmi screen broadcast/sharing function so you can see ,amongst other things, the RPI screen (even when headless) on another pc using just a web browser(you can have security) - Chrome and Firefox work . 

In initial tests it is far far faster,at displaying the HDMI output of  the RPI than ANY remote desktop I have used.

UV4L Doesn't work on Windows as server (Unix only hence name) but fine using Chrome Browser on Windows to connect to an RPI (says Ubuntu 18 but haven't tried it).

There are a number of other features which look interesting - such as making any MJPEG device act as a Linux/Unix Video device so you could (not tried it) use any streaming/broadcasting software that allows /dev/videoX (x being a number 0 - 99) to be used as input - so one could use VLC Media player on Windows to pick up FFMPEG output from RPI.

Link here https://www.linux-projects.org/uv4l/ if anyone interested.

Anyone had any experience of using UV4L ?