I use my iPad Pro for taking note taking during lectures and for reading. I would love to be able to use it for LaTeX too, however ShareLaTeX has a bug [0] making it impossible to navigate text using the arrow keys.
For programming and other more technical things I do not see any reason to use the iPad. MacBooks are lightweight and more competent machines – the only thing worrying me is Apple's recent lack of interest for macOS and the Mac overall.
The (offline) LaTeX situation on the iPad is pretty good, actually. There’s Texpad and Tex Writer, both of which are pretty good. Personally, I use a fork of iVim that contains a Texlive distribution (https://michaelgoerz.net/notes/editing-latex-on-the-ipad-wit..., as mentioned in my earlier comment)
MacOS isn’t suffering from “lack of interest.” As far as Mac, according to media reports, Apple is even working to develop their own chips — hardly the hallmark of a “lack of interest.”
For programming and other more technical things I do not see any reason to use the iPad. MacBooks are lightweight and more competent machines – the only thing worrying me is Apple's recent lack of interest for macOS and the Mac overall.
[0] https://github.com/sharelatex/web-sharelatex/issues/611