That looks like a nice little board, but the Teensy 3.0 has been around for a while and is even slightly cheaper [www.pjrc.com]
But I think the problem is really not the hardware, it's about the software support and the "mindshare". AVR works, and people know and understand it, so there is little incentive for change.
Traumflug has done a Cortex M0 version, and I have ported some Teacup firmware for it, but I think there has been zero interest in the firmware. Not even to say, "that was a load of rubbish" :)
The fact is that all firmwares require some level of porting to run on an ARM, and then you leave the friendly comfort zone of the Arduino IDE (with the exception of Due). In addition, all ARM chips have different peripheral registers, so a port for STM32 will not run on an LPC chip. Basically you will need a lot of active developers to support the platform.
The only ARM board getting any traction appears to be the Smoothieboard, with quite a lot of development activity. The Smoothieboard is quite cheap, it's open hardware, and there are variants being planned. Smoothieware is rather large, but a LPC1769 is only $5-$6 in small quantities. The LPC1769 is also one of the mbed platforms, which has decent software support.
But I think the problem is really not the hardware, it's about the software support and the "mindshare". AVR works, and people know and understand it, so there is little incentive for change.
Traumflug has done a Cortex M0 version, and I have ported some Teacup firmware for it, but I think there has been zero interest in the firmware. Not even to say, "that was a load of rubbish" :)
The fact is that all firmwares require some level of porting to run on an ARM, and then you leave the friendly comfort zone of the Arduino IDE (with the exception of Due). In addition, all ARM chips have different peripheral registers, so a port for STM32 will not run on an LPC chip. Basically you will need a lot of active developers to support the platform.
The only ARM board getting any traction appears to be the Smoothieboard, with quite a lot of development activity. The Smoothieboard is quite cheap, it's open hardware, and there are variants being planned. Smoothieware is rather large, but a LPC1769 is only $5-$6 in small quantities. The LPC1769 is also one of the mbed platforms, which has decent software support.