I see your point, but I'm not convinced that the amount of data (raw volume size) and the read speeds of flash lead to the same behavior as shaders + GPU. GPU's are processing an order (or several) of magnitude more data, which makes shaders a useful feature: data and computation locality.

Flash is 10x slower than RAM (in an ideal case), and even then, we haven't had the need to introduce 'shader like' features into RAM - yes, because historically we haven't stored all that much in it, but even with modern 64Gb configurations, same thing...