Wireless isn't non-existent, it's just not the proper way to approach a quality installation. Especially any installation which may require videos at any point, is a real deal breaker. Throw in, the configuration which is typically way beyond the average user, and things can get even more crazy.
People think they can show up in a room, turn on a computer, and by magic, the projector will go "Hey look! A computer! I bet they want to show that computer right up here on this projection screen. I will handle all of that for them so they aren't confused at all."
No, it's a page of instructions of how to set a computer up to show video wirelessly on a flat panel or a projector. This typically requires them to connect to a corporate network, or a guest network, and requires the projector to be connected to that network as well.
Then the rub: The wireless connection can't come close to showing video. It's there for PowerPoint presentations. Excel spreadsheets. Maybe some Word documents. It doesn't have anywhere near the bandwidth to support full frame rate video.
There are wireless HDMI transmitters/receivers which DO work halfway decently within the same room. They have some delay to them, so they aren't perfect.
There are also far more reliable wireless presentation solutions such as Barco's Clickshare product, or the Mersive Solstice Server which most often just 'work' for wireless presentation. They still require a bit of effort from the person who is connecting, and they carry a real cost with them, but they are far more reliable and compatible than what often comes with a projector, or something like a Chromecast may be. Still, you aren't going to get full frame rate video from these products. The bandwidth required is just too great.
That could lead to a whole discussion of how Netflix works so well, so surely you must be able to get the same out of your computer... But, that leads to a conversation of how Netflix gets professionally compressed videos ahead of time and doesn't do real time compression. Or how networks do real time compression, but then that's a discussion of how their real time compression equipment costs $5,000+ to deliver.
The level of equipment we are talking about simply isn't up to the task of real time encoding of full frame rate video. PowerPoint, Excel, and Word. Call it lucky if you can make it so everyone can figure out how to use it.
Someone who uses it every day, for the intended content, will have no issues.
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.