Since 50 year old grandmas don't seem to have much trouble getting to grips with the iPhone and iPad, I struggle to understand the mindset of people criticizing Metro because it'll be impenetrable to business users. Do grandmas working for enterprises have that much of a lower IQ, on average, compared to those that don't?<p>This is the kind of thinking that caused Bill Gates to insist that mobile devices must ape the Windows 95 UI - an attitude that left the field open for Apple to radically re-imagine mobile device interfaces and knock Microsoft out of the running for 5 years, and counting.