Our designer recently did a bit of an email design showcase internally (here's the blog post version), but here's one stand out example we particularly liked (this is not an actual Tommy Hilfiger email):

http://tractiondigital.com/wp-content/uploads/2015/03/Phone-flip-demo-e1427770268696.png

Would love to see some other cool examples of mobile design that isn't just easier to read on mobile, but has a little bit of fun with the medium!