I think this is another beginning for all speculations and cool designs to take rounds of the next i-factory product. So after the color-coaster ride, the iPod NanoTouch Gaming Concept is game for better.
This concept by Isamu Sanada could probably become the attraction of Apple retail stores sometime in future or just exist as a mere showcase of prolific designer skills.
The iPod Nano Touch Concept featuring detachable game controllers could easily leverage the experience of owning an Apple Product. It would feature the high set of specs including 2.8-inch touchscreen display, a 3.5mm headphone jack and dual dock connectors. Sony PSP 3000 may be a thing of the past, I hope Sony is reading this.