It's true that the Wii's graphics aren't close to the PS3 and 360 systems, and the online gameplay isn't as good, but what does the Wii stride in that the competition can't?
1. Innovation: The controls for the Wii are innovative (okay, they aren't the first times someone has made motion controls) in that it's brought them to mainstream popularity. The Kinect and Move were simply made to cash in on the motion control phenomenon, though the Kinect innovated on this by letting you be the controller. The Move is basically a Wiimote with a colored bulb (which actually looks cool in my opinion).
2. No downloadable content added to physical games: This is the case for 360 and PS3 games, but I don't see much of it on the Wii. It doesn't seem like the developers are holding back on the Wii. The downloadable stuff is actually separate.
3. Appeals more to Old School Gamers: While the PS3 and 360 are trying to appeal to the new school gamers (which is fine by me), the Wii has a lot of arcade style games that are simple to play and a joy to behold.
4. Lots of controllers: The Wii has a lot of controllers and add ons; the wiimote, the nun chuck, the wheel, the classic controller (and the pro edition), the motion plus, the jacket, and tons of third party controls.
5. Full Manuals: This might seem odd but compared to the short PS3 and 360 manuals, the Wii's manuals are big in length (that's what she said) and colorful (there are a few exceptions *cough EA*). When I get stuck on certain games, I often look at the manuals, thank goodness.
6. Quality First Party support: While Microsoft and Sony have excellent third party support, Nintendo has excellent first party support. Quality games such as Super Mario Galaxy's 1 and 2, New Super Mario Bros. Wii, Super Paper Mario, Mario Kart Wii, Super Smash Bros. Brawl, Zelda: Twilight Princess, Kirby's Epic Yarn, Donkey Kong Country Returns, Wii Sports and Excitebots: Trick Racing prove how Nintendo takes a simple concept and makes it go a long way.
7. Bigger focus on Local Multiplayer: Unlike Microsoft and Sony, Nintendo doesn't really have quality online multiplayer (Mario Kart Wii is an obvious exception), but it seems to have a deeper focus on local multiplayer. Games like NBA Jam, Super Smash Bros. Brawl and Geometry Wars Galaxies are great fun with one or more friends. And without the annoying prompts to go online!
8. Gamecube Controller Ports: Yes, not only can you play Gamecube games on the Wii via the backwards compatibility, but you can also use the original Gamecube controllers to play them! Sweet!
What do you guys think are the Wii's strong points?