Work is in progress to support more than four active people in video calls. We will keep you posted.JohnNeu commented
I'm posting this merely as an FYI to help new adopters of Teams as a "conferencing" solution.
After heavy testing with 7 devices on my desk on in a Teams "share/conference" :
The host/presenter could see 5 webcam video streams simulatenously, 4 of the cams being in one window, plus 1 more window displaying the most recent talker.
Participants could see 5 cams simultaneously, with or without a presentation/screen sharing. Anyone joining after 5 cams are added thumbnail images. If a thumbnailed-person speaks, then that person "upgrades" to being one of the 5 active webcam videos (& one of the prior videos then downgrades to a thumbnail image). Be aware that not all participant see the same 5 most-recent-talkers, and I couldn't establish a soild pattern as to why the inconsistency happens. But, I suggest people mute themselves when not speaking because it seems that when each person speaks for longer durations then it becomes more likely that all participants will see the same last 5 speakers as active video.
Small displays, like mobile phones, when viewing a shared screen or application will only see 1 webcam.
Remote control of presentation/screen:
Guests (people not in your Office 365 organization) cannot remote control. Only a person in your org can request to control your “shared full desktop screen”, such as to assist you or for you to pass control of the presentation. The presenter cannot proactively pass control to a participant, the participant must request to take control. Single window sharing cannot be remote controlled. Only full desktop sharing can be remote controlled.
The same audio gripes apply to Teams just as with any video conferencing solution (goToMeeting, etc.).
Phone lines are by far the best option due to being real-time & when using open-audio conference room phones you can rely on their proven sound-cancellation technology.
With PC audio, excpect audio delays and intermittent fragmenting/artifacting due to PC latency & Internet bandwidth. As a result, expect participants to sometimes talk over one another for brief moments or ask people to repeat. Ask users to wear earbuds/headphones to eliminate echoing that otherwise would be caused by the speakers' sound bouncing off walls and back into the microphone.
That's my two cents, anyhow...
Thank you for your suggestion! We really appreciate the feedback and idea. We have reviewed this request and started working on it. I’ll let you know as it nears completion.