I was at a conference the other week, and one of the big takeaways for me is how many people actually have some sort of disability. In the US for people aged 18 - 65 it's 10%, but for those over 65 it jumps to 37%.

It's easy to dismiss these statistics as 'not applicable to our customers', especially when you are a healthy twenty-something, but the statistics say that as we get older, 1 in 3 of us will have some sort of disability.

The talk also mentioned temporary impairments which restrict the way users can interact, similar to disabilities. What happens if you have a climbing accident and your mouse hand is in a cast for three months? Or maybe you are just on a train, holding the rail with one hand while it's swaying backwards and forwards.