In announcing the price drop on the 3DS, Nintendo also let slip some additional, previously unknown, information about their little console that could.
• Nintendo Entertainment System games are coming to the eShop
• Game Boy Advance games are coming to the eShop
• Previously known simply as Super Mario, it appears the all-new Mario game for 3DS will actually be known as Super Mario 3DLand (it's still not known if this is the case outside of Japan, or simply a typo)
As usual, once this stuff is confirmed, we'll be sure to let you know!