Office 2013

I have the option of getting Office Professional Plus 2013 for home use via my employer for $10. I already have Office 2007 at home. Even at this steeply discounted price, I'm not sure it's worth the $10 (hey, that's a decent hamburger) as I'm quite happy with 2007 and I don't foresee owning any touch-screen computers any time soon. Am I missing anything? Is 2013 worth the upgrade if I don't need the touch-screen capabilities? Why?