All about the software
I also agree that the hardware was great, but it was the software that was the killer feature. If they're simply going to put all the usual standard Linux/Android/whatever applications on this then they've completely missed the point. For me, the 5 was good but the 3mx was the best in terms of the UI. The stylus just slowed things down. Once you learnt all of the shortcuts it was far faster than using a PC. I wrote some not unsubstantial documents using it. Each style could be assigned a shortcut so you hardly ever needed to use the menus, let along point and click - it was incredibly quick. The Diary/Todo application was simply sublime and no PC offer has ever bettered it. It was expensive, yes - even had to bay a fortune for the separate spell checker (which I did), but it all worked wonderfully.