Nintendo is already planning a successor to the DS that features 3-D graphics without the use of 3-D glasses that it hopes will help the company retain and grow its share of the portable gaming market.
I think the 3DS was a big move for Nintendo. I was given a DS when I was young and loved it. My sister ended up getting a DSi later on, and I remember being so excited and begging for the 3DS XL that was coming out. It was crazy to me that you could switch between 2D and 3D and brought Mario to another level for my brother and me when we got them.