I've seen all 4 combinations of "looks like" vs "is actually" {button,static text} on a web app I was once forced to use. Some of the plain text was actually a clickable button (with NO hover effect), and some of the "buttons" (or more precisely, short actionable text with a rectangle around it) were actually just labels. Imagine the word "Order" presented in both styles, and my astonishment when I figured out which one I actually had to click.