WinUAE pretty much killed Amiga accelerator market. Suddenly it was not required to invest thousands to get decently fast Amiga.
I guess Amiga (accelerator) market was already dead by the time WinUAE reached this speed.
Usually, emulators have no impact since new machines that are many times faster get released and new software get written for it.
The problem with the Amiga is that the new machines aren't that fast, and people tend to not update (because it's expensive, there are little to no software written for it).
In this case, emulation could be seen as a problem. But seriously: there are so few people using Amiga today, does it really make a difference ?
Why is everything so closed on the Amiga ? Every OS but AROS aren't free/opened, no sources are available (except some parts like USB stack,... which developers no longer maintain). Even free stuff gets some kind of software lock (see MorphOS PUP free edition that requires a registration that locks it to the PowerUP board) or licence lock (cannot be used with emulators). What's the point ?
Having some open mindedness would benefit to everyone... It's 2014 and there's maybe less than a thousand users in the world, and a lot less developers. Why not concentrate on doing some fun work and stop closing code, seeing threats in the other "camp", locking apps to hardware, writing some useless licence... ? What are the stakes?
Anything released today is a good thing. So is WinUAE PPC support.
My two cents...