Will be the XMOS 4xCore 400 MIPS at 3 USD/piece beat ARM in performance/price and unit/price departments..?
This product is going up against things like Atmel AVR, ARM Cortex M0-M4 and the like, rather than low-end ARM SoCs. It's meant to be embedded within a product and just do what it's programmed to do, forever - much like the USB converter chip on the FPGAArcade - it converts complex USB keyboard/mouse (and maybe more) to simple serial signals the FPGA can work with simply.