Cave Story 3D was originally meant to come out this summer, otherwise known as the past. It's now scheduled to come out on November 8th in the United States. Perhaps these screenshots will tide you over.
Feel free to stick them to your 3DS and pretend you are playing. Note that the hero is a 2D chap living in a 3D world. It's an optional feature for those who fear the future or simply prefer the original style.