If a student wants a PC, they want a laptop, not a desktop. As such, we're likely to see a cheaper iPad and cheaper MacBook Air. Mac Mini is not relevant to this event or it's customers.
Agreed that most students after a PC, want a laptop, and a cool one at that.
But still there are some students who may prefer a desktop for one reason or another........
For one, when the iPhone and iPad came out my students reckoned that to get the most out of them they needed to be complemented by a Mac computer. I guess that has not changed, and a cheap(ish) and cheerful Mac Mini would fit the bill.
As a teacher I prefer use a desktop with a decent sized monitor at home, to a pokey little screen on a laptop designed to be toted from home to office or campus, to cheeky cafe, day to day.
I seldom carry a phone (just own a 6 or 7 year-old $22 Nokia which lasts a week or two between charges.), and don't have a tablet. When I leave my desk I am off line, and I like it that way.
I occasionally take my Mac Mini to work, to use with an LCD projector in class, and am fine with that. Can be hooked up and booted in a couple or three minutes, and packed away in a minute or so. However, these days I am taking the Mini to work more than in the past, increasingly the textbooks I use are supplemented by downloadable material instead of CD/DVD. I can see the case for having laptop (such as a base model MacBook Air) to supplement the desktop, but not replace it.
As for schools which may want a large number of computers for a lab or classroom; the Mac Mini is a cost effective way to go, especially if they prefer go MacOS.
In short the Mac Mini is relevant to an event focused on teachers and students...... and the new Mac Mini is almost certainly coming...... sooner or later.