Projects like Blender are amazing and others mentioned by the author are really almost replacements for Adobe, i really like GIMP's scheme scripting language for example which allows more flexability than proprietary adobe plugins. So I'd personally be really exited if GNOME started going in this direction.
Imagine for a second, linux with high quality media content creation tools, there's huge holes especially in video (nothing near comparable to After Effects or Final Cut Pro - forget ffmpeg for that )
Also as for myself I do all my development on Ubuntu / Debian while switching to windows for testing out on that platform (IE for example), but I only do browser/networking stuff.
Anyway, I like where he wants to go, and would love to see GNOME head in the direction...