Only afewof these modular components have been designed so far: the AVR-X (an Arduino-compatible microcontroller), FRAM-X (512 byte chunks of stackable Ferroelectric RAM) and ADC-X (an 8-channel analog to digital converter).
Shortly after, SMC, the Japanese industrial giant, sold a similar version in the U.S. It had made afew alterations?eliminating one of the components and using a different material for another part.