Reading this forum I see more and more questions about Babylon.js HTML implementation.
While there still are not much examples, actually I see no real limitations except the native limitations of HTML and JS.
This flexibility gives us a good chance to create completely new 3D Web experiences.
Below is example of Babylon Viewer + Slick Slider.
https://codepen.io/eldinor/full/XWrMzpz
Slide 1: Just image
Slide 2: Default Babylon Viewer
Slide 3: Babylon Viewer on White Background (DOM configuration)
Slider stops when mouse is over slide. You can click at Fullscreen at Slide 2 and interact with 3D model as long as you like. Then hit ESC and slide show will go on 