Independent of the elegant typesetting it produces, TeX contains well-designed notation for mathematics, reflecting the algorithmic bent of its author, Don Knuth.

Mathematics doesn't change as frequently as desktop publishing, so it's a good bet that the TeX (e.g. $\int_0^1 \tau \, d\tau$) is going to be around as long as people talk math online.

That said, I think there are much easier-to-use and less error-prone desktop publishing tools (e.g. Scribus) for less math-heavy domains, like magazine layout.