It is usually the hardcore gamers who are most concerned with enhanced graphics -- graphics that are "next gen," so this post is especially for you.
Look, the graphics on consoles have come to the point where developers are not limited to realizing their vision. More pixels, shaders, polygons etc. then what? Where are you going to go from there? They can make Doom 3, Resident Evil 5, Gears of War, or another graphically cool games on the Wii, albeit scale down, but still doable. I think graphic capability was important in the last generation or two. Why? Because real-time 3D games can finally be realized. That's why games like Mario 64 and Zelda OOT were so cool -- those games couldn't be done on a weaker console.
Furthermore, graphics are not really important to most gamers. Fun and innovation is what's important to gamers. That is why so many gamers enjoyed playing Wii Sports even though the graphics looked relatlively bad (if the game was released without using motion controls we wouldn't even know the game existed). It is also why the Nintendo DS is killing the PSP in sales.
The new interface was innovative, just as the Wii interface is a innovative. And the PS2 outselling the PS3 shows the consumers don't too much about more eye candy. Yes, that's what the PS3 is, just more eye candy. There is hardly anything new about it than just better graphics -- same type of games just in high definition.
What Nintendo's controllers does it expands developer's gameplay options -- it gives them more room to implement their creative ideas. And from that we get more innovative games. think motion controllers is the next step in the evolution of gaming. Button smashing has been around for decades. Nintendo has changed all that by bringing in a new model for gaming that is more accessible and gives gamers more "control".
I tell you guys what. If Sony, Microsoft, or any other company that comes out with their next console without motion controllers similiar to Nintendo's I'll eat my hat.