I mostly use the buttons for page turns on my 350, but that is because I don't like the swipe motion. A single tap on the left or right of the screen (as on the new Kobo) is "button-like" enough for me. Also the location-sensitive tapping/double-tapping to bring up options and menus (as seen in the video
here) seems a reasonable option that would be easy enough to use once you learn the system.