Adding the Bitcoin symbol to the keyboard will scream "ADOPTION". The question is where to put the key? I would suggest they replace the $ with the bitcoin symbol... just kidding. However, it gotta go somewhere, what do you think?
This is very far to happen , i think the best to look at is Bitcoin for Emoji instead , manufacturer will find this difficult to add as they need to remove some to be replaced and this is not what we can expect in the sooner time.
anyway Nice proposition i am one of those who wanted this to happen as i don't need to click the emojis above the forum and just directly type in my keyboard .