The comparison in this thread doesn't hold much water. Comparing late gen Xbox games to launch Wii games is about as apples to oranges as you can get
So that we're not taking any bias MS/Nintendo views, let's compare launch PS2 titles to the late PS2 titles
First, let's look at a couple racing games. First, a PS2 launch title; Driving Emotion Type S
Now let's look at a newer title; Gran Turismo 3 A-Spec
Now, I do realize that two different companies made these two titles. With that in mind, let's compare a launch PS2 title, made by Square, to another title made by Square
First, let's look at a screenshot out of another PS2 launch title; The Bouncer
And now, a screenshot out of a newer PS2 title; Final Fantasy XII
I've played these four titles, and I can vouch for how much the graphics have improved over time. So, what's the point? I'll answer that question with another question; what was the only constant with these four titles? The answer is simple: the PS2 itself had not differed
In case you're unable to comprehend what that means, I'll explain it. Since the hardware (PS2) has not changed, but obviously the graphics are much more detailed/dynamic, that can only mean that the software has been getting better over time. The companies that made these titles needed time to create better looking games for the system. The Nintendo Wii is no different. It has not been available long enough on the market for anybody to push the graphics on the machine. Are the graphics terrible? Absolutely not. Is there room for improvement? Definitely, and I'm positive future titles will look much better. Also, it's near pointless to say future titles will look bad because of how development pictures look. Most every game that I've seen development pictures of, looks a hell of a lot better once the game was released
In my eyes, there are two types of gamers. First, there are fanboys. To me, a fanboy is somebody who will relentlessly bash any product that they aren't on the bandwaggon of, regardless if they have a logical argument or not. Bashing a system when it hasn't been available to the public is a sure sign of this, especially considering that just about every system (yes, even the Xbox you are praising) has gone through the same process
The second, which I would simply call "gamers," are the ones who can appreciate a variety of gaming, the ups & downs to different systems, and who know that launch titles/the first few weeks on the market DO NOT display what the console is capable of
And yes, there will be online multiplayer with the Wii, it just hasn't been turned on yet. Most of us have known this for a while
Cliffnotes: Give the companies some time to make better looking titles for the Wii. Most gaming systems have had the same problems at launch, the Xbox was no different. Nobody likes a fanboy