Do people think that there is a market for an RPN, simple scientific with bluetooth that can act as either a numeric keypad for a laptop or simply just send the contents of the X register to the laptop as if it had been typed in?
I often find myself calculating on the calc and then re-typing the answer into the PC.
Targus have a couple of products that give an idea of how it might work:
keypad calculator but USB only and bluetooth keypad but no calc but I wouldn't expect the keys to be full-sized -- it should primarily be, and look like, a calculator -- just one that happens to be convenient for sending results to a PC.
Obviously it would need to be fairly chunky in order to pack enough batteries to power bluetooth for a reasonable period but this need not be a bad thing.
Posts in this forum frequently request/beg/demand that HP produce an RPN four-banger. Well maybe this is the excuse they need to justify the effort needed to produce a simple RPN machine?