I'm fairly sure the Pearl screen on the Kepler is a misprint, given that it's meant to be 300dpi (which I haven't seen on anything less than a Carta screen). The apparent lack of page-turn buttons does give me pause however.
[Addendum: closer examination of the pictures on O-B's site reveal that, although it does not have obvious page-turn buttons on the front, there are a pair of small page-turn buttons approximately three quarters of the way up each side.
Further scratching around reveals that there will be three Kepler models: the Kepler Lite, the Kepler and the Kepler Pro, only the Pro will have the page turn buttons. Also, according to
this video, one of the models will be water-proof.]
Additionally there's disagreement between the English and Chinese sections of the site as to what type of touchscreen it has -- the Chinese section Google-translates as "Capacitive touch (supports 2-point touch)", the English section as "Digitzier with stylus".