Just that I have never been in a conference room with an Apple TV attached to the projector. They are a pretty expensive addon considering that I rarely see other Macs at the business meetings I attend.

Yeah.

Ports are about compatibility with the outside world. That means having the same connectors that the rest of the world has.

I don't get to choose what those connectors are. Apple as a company has some influence on that, but not enough.

I suppose I live in a slightly different world than many - SF startup, everyone has a MacBook, so AppleTV in conference rooms is a no-brainer.

No, but it is overkill compared to a single hdmi cable.