While there has been a sharp decline in the yen's value, analysts say it is a by-product of the monetary stance that Japan's government has taken to stoke inflation and boost its growth.
The nano does not yet support Bluetooth 4.0 (or any version of the specification), but the standard has been seen as a key component in helping reduce power consumption for such a product, There are also lower power display technologies -- such as Sharp's Memory in Pixel LCD on the forthcoming Meta Watch -- from which Apple has abstained.