He may be a dev but he wouldn't be able to run a hardware company if that's how he thinks. Just adding HD and more ram isn't going to make consumers (especially Nintendo fans) want it. I wouldn't.
Nintendo needs to do much more than that. A better online system, more power than PS3, improved controllers, etc.
No. They cannot make it like the 3DS. The 3DS has a small screen that has the tech for glasses-less 3D.
They can't do that unless they start selling TVs or screen cover thingies with the console, and that's sure as hell not going to happen.
glasses-less TVs are coming soon but they won't be mainstream for a while.
The console will support 3D (like wii and GC) but it won't be one of the selling points they market it on.