@Bubbles. Essentially your windows box can do everything my mac does.
But my mac looks nicer, doesn't make a fuss and just gets on with it.
Trust me, I've been using Windows since version 3.0. It's the simplicity of the mac which wins me over and for most users whom just want to surf the web, email, facebook and look at photos, the mac is a winning combination.
A friend of mine bought a laptop yesterday and the first thing she's done is give it to me so I can uninstall all the crapware, apply all the latest security patches, optimise it so it's running fast as it can and install some free antivirus.
If she'd bought a mac, I'd tell her to do it herself. You plug it in, type in your name, tell it which country you live in, type in your wireless password and that's pretty much it!
And as Rusty said, when I upgraded my OS from Snow Leopard to Lion, it was a lesson in simplicity which Microsoft should learn from.