Can we talk about these sandwich bun substitutes which are genius?

Because buns are so 2000!

1. Lettuce.
http://www.5dollardinners.com/lettuce-burger-wraps/
2. Bagels.
http://aht.seriouseats.com/archives/2012/11/bagel-burgers-now-ava ilable-at-mcdonalds-france-bagel-stories.html
3. Bell Peppers.
http://www.myrecipes.com/recipe/jalapeo-stuffed-burgers-with-roas ted-bell-pepper-ketchup
4. Avocados.
http://nerdist.com/avocado-burger-buns-are-a-weird-new-fad/