Phil Schiller Says iPad Pro Can Both Supplement and Replace the Mac
macrumors.com
macrumors.com
Opposite is with iOOS tho - I wouldn't trade it for Android, but the hardware is not top anymore.
However, if you like to have all sorts of stuff serendipitously scattered about a very large (or multiple very large) monitors, an iPad isn't going to work so well!
Use Working Copy for Git and Textastic for code, they support round-trip. I prefer the enterprise versions. (Also consider Koder, Coda, and Prompt.)
Screens for Remote Desktop.
Ulysses for Markdown that syncs to all devices and publishes to many formats. Visit the website to understand all the things this software can do with Markdown and more.
iThoughtsX for mind-maps that can be graphs (most only do trees) and export to markdown, PowerPoint, Word outlines, etc.
Goodnotes or Nebo for hand notes and diagrams depending on your style.
Liquid Paper, PDF Expert, and/or Papers 3 for turning white papers into new thoughts. Especially pleasant with Apple Pencil.
Kindle for your books library. MS Office for ... office docs.