Please identify an alternative technology that will output, as easily and as well as html + css, ONE 'content' file to the following range of media types:
- speech and sound synthesizers
- braille tactile feedback devices
- paged braille printers
- small or handheld devices
- printers
- projected presentations, like slides
- computer screens
- fixed-pitch character grid, like teletypes and terminals
- television-type devices
Today you are right(ish) - there is not much of a legacy. Tomorrow, there will be - users will demand very rich online experiences - HTML and co will not be able to deliver it. You might be right - I'll retain judgement - let's come back here in 5 years and see...