I have been thinking that I should have the above in future slides.com/erikchampion/ presentations.What to use? Inside slides.com you can use code (frames etc) so why not try:
Smoothly animate thousands of points with HTML5 Canvas and D3
Peter Beshai (16 Mar 2017 blog post)
https://bocoup.com/blog/smoothly-animate-thousands-of-points-with-html5-canvas-and-d3
A nice review article on 5 HTML alternatives to Powerpoint.
http://www.sitepoint.com/5-free-html5-presentation-systems/
I also like reveal.js
http://www.quora.com/What-are-the-pros-cons-of-webgl
For those burnt in the past by VRML and propietary 3D web plugins (Adobe Atmosophere, Google Lively et al), this is a good place to start.
One question nearly keeping me up at night (but overshadowed by the unpredictable demands of a two year old) is how do you get around using a technology to design 3D virtual places despite the technology (html 5) not having a physics engine? For virtual heritage I think it is it an interesting question and it can be answered.
Ear Zow Digital