Looks a nice display - my one controller (Tridium - which runs a Java VM) polls the internal 16 IO points in 31ms - which is pretty good to be fair. Another controller which is android based is being scanned over BACnet in 47ms for 24 points - so actually I'm quite impressed - though that is not the internal controller speed which is 20ms.
I have to say though that the graphics on modern BMS's can be very impressive - photo-quality is possible and fully interactive as they use HTML5 - some HMI's being effectively tablets, but a laptop or desktop is the usual interface and hence can have HUGE displays if you want!
And of course, they support BLE and in some cases ZIGbee, Enocean and other wireless protocols.
But is horses for courses. Both have their markets and both can do the other with lesser or greater degrees of success.