Weird how you insist that "Sega CD" is somehow confusing, yet cite 3DS positively. The 3DS actually had a similar problem as the Wii U, where consumers couldn't always differentiate it from its predecessors. ("What's the difference between DS, DS Lite, DSi, 2DS, and 3DS?" "Can they play the same games?" etc.)
This is true. I admit the 3DS is a confusing name, but it does spell out the features. 3D. Dual Screens. 3DS. I don't know what else you'd call it. You could blame marketing and hardware designers for not differentiating it more from the DS.
It's still a better name than the Wii U.