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12 bit colour is actually not that bad -- it hasn't been that many years since high end cellphone LCD Displays did 4096 colours. Even laptops had 12 or 16 bit LCD panels for a very long time, and many are *still* not beyond 18 bits. 12 bit colour is essentially 4 bits per channel, so it's the quality of 16-tint greyscale as we have now, only in colour. Presumably adding one or two bits to greyscale eInk to produce 32 or 64 tone greyscale will be the exact same process as getting to 15/18 bit colour and so we get the benefit of the R&D on both our types of screens.
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