Ipad vs. regular labtop

You know what really grinds my gears?? When my sister has an awesome Ipad and comes to use my computer to get on facebook and surf the web etc. Now i know that Ipad's have the capabilities of Facebook and the internet, so what is it that makes my sister set aside her Ipad and have her come use my computer!? I felt like telling her to just give me her I pad if she isn't going to use it.. If anyone knows the differences between Ipad and a regular labtop then please let me know!