I think that these days, workflow is everything. If the KPA team doesn't come up with an editor soon, Bias Head will be serious competition. If it's comparable in sound quality, of course
I think an editor is nice but I find the Kemper very easy to edit from the front panel.
I actually think workflow is everything for some people. But look at tube amps and analog tape - they sound better and some people are willing to sacrifice workflow for sound. If Bias doesn't sound as good then people will still be using their Kemper. After all why not go and use Guitar Rig right now? I can answer that right now...;)