A few minutes ago, at today's Apple event, CEO Tim Cook showed this slide, which we have borrowed from The Verge's excellent liveblog. It shows that Apple has shipped more iPads than its competitors have shipped computers. And that was before Apple announced the new and improved iPad.
Cook devoted the beginning of the event to talking about Apple's vision of a "post-PC" world, one in which your primary computer doesn't have a mouse or a keyboard. This chart shows the success of that vision. And this is just the beginning.