wii vs ps3

Christmas season has definitely arrived. My wife and I have been shopping for a new video game for our 7-year-old son. We're torn between the PS3 and Nintendo's Wii (as is the rest of the world, I guess). So let me show you our recent experience looking for some information in their websites.
If you visit Wii's website, you'll notice that Nintendo's focus is on clearly establishing that there is a new way to play video games now. Take for example this Wii commercial (here), where two Japanese "Men In Black" knock on people's door inviting them with the catch phrase, "Wii would like to play". Pretty cool.
You can also view how people from different parts of the world interact with the games using the new virtual console (here). You really get the impression that it's a whole new "ball" game. I was completely blown away by these videos. The days of playing video games sitting comfortably on the couch are definitely over.
Now take PS3's approach in comparison. If you visit PS3's website, you'll have the impression you are entering the set of Kubrick's "2001. A Space Odyssey", with some mysterious black machine sitting in the corner of a cold white room. All you'll find is technical information, and lots of pictures of the console itself. If their goal was to show that this machine has supercomputing powers, I guess they succeeded. My question is if that's what it takes to sell the product.
And the commercial is really creepy (this is the US commercial. See here).
Now, which one would you prefer?
To be fair, one point we have to acknowledge is that both machines offer different performances (at least in terms of graphic quality) and analysts say that the PS3 is really a supercomputer for the price of a PC (see last post). Their suggested retail prices reflect that difference, the Wii selling for US$ 250.00, about half the price of a PS3.
And we? Well, I personally loved the Wii, but we won't be able to buy it now (nor the PS3) as both products are not going to be available for this Christmas anyway, after all this hype (which reminds me I have to buy something else for my son). So, we'll have more time to do some more research, but I have a slight suspicion that we're going to buy both of them in the end (such kid spoilers, I know).