^ Hey I second the wheels thing though I would change up beer dispenser to vodka.
Seriously, I might pay 25% more happily if the devices were a bit more ruggedized and more immune to unhappy weather conditions and oopsie screen damage, all without totally compromising vital things like size, weight and overall aesthetic design. My logic is simple: even the cheapest used paperback can be read without undue fear in rainy, wet, snowy conditions.
Might make a lot of cover manufacturers unhappy, but I daresay they would still do OK as folks might want to personalize their gear anyways...