It is rather essential which technology will they use for other half - if it will just be a -technically, separated - Bluetooth HID one, they can - with all due respect - go stuff up with it. If I would like to waste battery power for constant Bluetooth usage to get basic functionality, I can attach any /dev/urandom mobile BT keyboard, and even do my own case/other half for it.

OTOH, some decent interface that wouldn't result in wasting power usage (or just USB without disabling hostmode - IF there will be hostmode at all) would be great compromise - people wanting N9-like toy would have possibility to buy it, people wanting something real with HW KB could obtain it, too.

it's all about about how well it integrates into whole device.

/Estel