We all know that one day Nintendo will start developing a successor to the 3DS. In fact, Miyamoto himself stated that they have already started thinking about it.
http://news.cnet.com...-3ds-successor/
So, let's speculate a bit.
First thing - the 3DS is, beyond any doubts, going to stick around for another 3-4, maybe even 5 years. The system has been selling like hot cakes ever since its price cut in August 2011. Huge success for Nintendo ! With that, it's been almost 3 years since the system launched and I think at this point we can start wondering about what the future of Nintendo handhelds holds.
Now, Nintendo, in my opinion, is the most unpredictable company in the market, which makes it hard to guess what ideas they might come up with. However, what we can do here is to discuss what we want it to be as potential consumers. What kind of a device you want it to be ?