just two different cabs for stereo use 
at the moment i play a guitarcab live and go with my cab sim D.I. into the PA.
To get a nice stereo spread as a single guitar player in my band, i could now do the following things:
Either get a cab cab with two speakers and mic both ...
or i could use the D.I. signal + one miced signal, as many bands do.
But i think having two cab sims in the kemper could have advatages while recording and live.
what do you think ? I'd love it
also mixing two IRs would be amazing