Tablets definitely need better navigation and entry capabilities. I'm not sure what would improve them to point of greatness, but they are currently a PITA to navigate and enter information. All tablets are this way, not just the KF. I think at the very least they need more buttons and a much better thought out touch interface. I'm not too keen on using pens or any other add-on devices because they are just more baggage to keep up with and something else to lose.

My Android phone has the 4 standard buttons across the bottom and volume buttons, just adding those makes it ten times easier to use than a KF, iPad, or any other button starved tablet.