Interesting thread. Isn't the title a little mis-leading?
The apps we're talking about aren't limited to professional use. Word processing, web surfing, those are applications are common applications everyone uses. When I hear professional use I think CAD (or other design programs), business apps (like inventory, tracking, etc), professional grade music/MIDI programs, etc.
Just getting basic programs of the types you've listed (that have utility to everyone) can be difficult on Amigoid platforms.
I can't see professional grade software being developed. Where's the market?