Hi, We should be reasonable about the features of the device, metal, and pen inside the device, will not happen, look at the Sony device, and hope that we get this one with with higher resolution, faster processor and android + the reader from M96
The simple explanation of what would go wrong with these suggestions, metal and make the pen house inside the device would make the cost of manufacture this thing goes up, how much? well how much an iPad costs and how much the Sony reader costs, and if I remember right everybody are saying something like "I don't want this to cost as expensive as the Sony device"
Now I used an iPhone and I used a Samsung Note 3, I prefer the Note 3 for it's flexibility and weight, Note 3 made of plastic was tougher phone for me than the iPhone. I do like the pen inside the Note 3, and I wouldn't mind a pen that size, but not if it increase the cost of manufacture, a 13" device will always be with a cover like my M96+, and the pen is always there, no big deal.
Now, things like weight and thickness are more important than any additional features, this thing is a secondary device for reading, you want to take it and your laptop in a bag pack to college, work or travelling, you want something easy to put in that back.
The position of the buttons are important, because you want the button for next page easy to access, even the flatness of the device back is important if you want to put it on the table and draw! it should not feel like a rocking chair
The device should be designed to be comfortable to hold in one hand for long hours of readings.
And before you suggest that maybe I should go and buy the Sony device (because I did mention it several times), it's for me still an open possibility, if I don't like what Onyx come up with, but I have a feeling that they are smart people, and they have been doing great job asking people for feedback.
End of January, I think there are 2-3 months before we see the device