Not too fussed with the HTML side of things - some extra tags are fine. Actual CSS will be quite nice tho
. I've never understood why people want JS, tho I guess a JS+SVG combo does have its place for kids books or whatever - I'd still hope it would be an extremely limited subset.
The only real worry is the storage it will be in. I am optimistic that the support will also be released for K3 - but I have a nagging suspicion about the lack of 'x-ray' from the K3's latest firmware - since this format would be ideal for dealing with that.
And on a lesser note : I'd love to know the missing numbers from the scheme, I cant help but envisage some guy tinkering away at a TeX/dvi render.