As bullet point functionality it'd be great to see LaTeX output from TW and I'd happily add my name to the list of potential buyers. It seems like such a natural combination. On the other hand I also sympathise with the various comments about this not being the appropriate way to use LaTeX. As far as I can tell, one of the reasons why TeX output from TW is so convoluted is because it tries to capture an exact representation of the document as it appears on screen, and LaTeX was never intended to be WYSIWYG.
To get decent LaTeX output from TW I'd expect some compromises would have to be made about how consistent the final output would be. Nonetheless, I do think this would be a really great feature.
I'm surprised to hear people say LaTeX is on the way out (maybe I'm blinded because I like it?!). For maths, is there really any alternative? One of the benefits of LaTeX is that you can easily stick an equation into the middle of an email (or anywhere else). From my exprerience in Computer Science, many publishers accept LaTeX even if they also accept Word and PDF too.