I worked in multiple companies that used streaming rather than physical connections for meeting presentations, and they were always so much worse and less reliable than just using a cable, dongle or not. Best case scenario it worked but there was a several second lag. There were a few meeting rooms that had the old fashioned physical hookups and those were always fought after because at least they worked reliably.
The last reliably streamable setup I've seen involved Plan B, a system built on top of Plan 9, and it was far on the weird side of the universe.
Many "streamable" options often end up actually using HDMI dongles, if working at all. Or work with very limited set of systems (the weird apparently undocumented reverse-RDP for projectors in Windows, intel-proprietary streaming, etc.)
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