There's a tremendous difference between using Windows to run the GUI and using Windows to do the real-time control of the servos and various other hardware.
Most of the time these machines run a small microprocessor which receives commands over some port and interprets them as it is instructed to. This is what's called a "hard realtime" system as it always responds within a certain amount of time, guaranteed, provably as per the design.
What Tormach is doing is eliminating the dedicated gcode interpreter hardware/controller and performing those operations strictly in software, on a program running on a PC. There's some utility to that, but pretending that it's as good as having a dedicated, realtime gcode interpreter is not honest.
Most of the time these machines run a small microprocessor which receives commands over some port and interprets them as it is instructed to. This is what's called a "hard realtime" system as it always responds within a certain amount of time, guaranteed, provably as per the design.
What Tormach is doing is eliminating the dedicated gcode interpreter hardware/controller and performing those operations strictly in software, on a program running on a PC. There's some utility to that, but pretending that it's as good as having a dedicated, realtime gcode interpreter is not honest.