I believe your wrong, I've never seen an Isys panel have interaction such as the Cue systems. Tab layouts, moving windows, popup windows...etc. Creston and AMX are like 'POW' here's my new window, the Cue system can have a new window 'flow' onto the screen.

Plus, all the 'work' is done in the panel, making your control programming much more simple. Soon it will be able to run a small system from the panel itself, without a 'brain'