I use 4 computers. A powerful highend desk top. A highend portable. and my new iPad. and an android lg phone. each has their distinct utility. the latter two are new classes of computational device with broader utility than the first two. History will judge me correct, I have no doubt. iPads have become necessary in medical practice. not as toys but necessary tools. our residents at duke all use them out of necessity. not just fun toys, but they are that too. and books. and movies, etc.