- Define quality because, historically Nintendo has always been the most underpowered system in any game market. They seem to be catching up now though (slowly) to Sony and Microsoft, especially with their new high tech hand held 3DS and new console they're developing with an HD display.
- The N64 was never that good. It was dated, using cartridges which provided faster load times but couldn't efficiently carry as much data as a DVD (i'm just guessing on this actually but i'm pretty sure the DVD had a higher data amount). It also, graphically never looked as good as competing systems at the time, such as PS2, Xbox, Dreamcast, etc.
- Nintendo has also always had cutting edge game controller designs. They always use modern or new technologies and ergonomic setups, the wii mote being a cool idea. It was extremly useful with games such as Resident Evil 4, creating a feeling of immersion you didn't necessarily get with the laser sight/controller layout with PS2/Cube. Also, if you don't need motion controls you can plug in other peripherals and configure it as needed.
- Lastly, and kind of a personal rant of mine, but 3D adds 'depth' to a game. This presents a whole new way to present and manipulate media. I don't understand why people continue to view it as 'gimmicky'. /endrant
- Now.. whether 3D, motion controls and HD displays are good for marketing is another topic and question altogether. I'm only defending that Nintendo does seem to be improving the actual quality of their products slowly over time.