Xbox emulation isnt progressing as easily for a number of reasons. Comparing with other console architectures doesnt make it less irrelevant.
That and coders have a life, and there isnt a lot of interest in general in Xbox emulation to pc since many hits have PC versions.
The reasoning behind using the actual consoles preferably comes from that if emulation isnt mature enough, you still have a way to play those games (complaining about the state of emulation doesnt accelerate things).
The DXBX team put a lot of effort since a while as can be seen here.
That and coders have a life, and there isnt a lot of interest in general in Xbox emulation to pc since many hits have PC versions.
The reasoning behind using the actual consoles preferably comes from that if emulation isnt mature enough, you still have a way to play those games (complaining about the state of emulation doesnt accelerate things).
The DXBX team put a lot of effort since a while as can be seen here.