a) …has only just (in the last month) been made available in all countries
b) …has too many variations for a new customer to comprehend
c) …has far too many first/third person shooter titles, or racing titles, or shooter/racing titles
d) …is portrayed as a device for adults, with very few titles for children, or for families
e) …is hampered by a poor reception due to relative high pricing, delayed &/or cancelled releases, and the loss of support for backward compatibility
f) …is in competition with the previous generation (PS2) console that is still in production & is continuing to enjoy good quality titles
g) …is all of the above

Regardless of the target audience of the entire demographic range of the population, the Wii is marketed as a games console. There is only one option to consider. Hence, there is only one decision to make. Job done.
It is not presented as a media centre, a DVD movie player, a photo viewer, a freeview video recorder, a video-on-demand hub, or a staging area for portable gaming.
You could also argue that it is marketed. Period.

The Nintendo console is priced to sell on the strength of the fact it just plays games, not only titles designed for the Wii, but also the legacy titles for the GameCube.
The GameCube controllers and memory cards also continue to function without modification or additional expense.
Nintendo also have a very strong brand associated with a highly successful handheld gaming history, as well as in-game characters that are recognised worldwide.

Sony has Sackboy.

The Xbox 360 also has an established audience from the prior generation, but carries the name of a manufacturer associated with mass-market family-oriented software (that is, allegedly, easy to use).
Not everybody has experience of a Sony Walkman, VCR or DVD player, Laptop, or a HD-TV. Everybody has, or knows somebody who has, a Microsoft operating system.
The Xbox 360 has easy to understand products; for example, “the one for playing on your own”, or “the one for playing online”, and “the Limited Edition one to promote the latest Halo game”.

Sony has the first (“how much?”) one, the second one (with extra controller, and two games), the third one (with a smaller capacity, the extra controller, and some different games), the fourth one (with a larger on-board drive, a different controller, and different games), and before the fourth one was out, the fifth one (with an even larger hard drive, the new controller, and a different game selection).
And that’s just in the UK.

Not every customer wants to buy a future-proof machine that can do everything today, tomorrow, and whatever may be available in the next 5 to 10 years.
Sometimes just a machine that can be unwrapped on Christmas morning, plugged in, and played with (without having to download the latest firmware, or sign-up to an online monthly subscription) is what the consumer wants.
Is it really that hard to produce a games console that just plays games?

That said, I will maintain my 30+ years of gaming by continuing to buy Sony consoles for as long as they continue to do what they do & do it as well, if not better, than their competitors. I do this by choice, not by loyalty.

I also have a Wii console, but rarely switch it on.
The titles on Microsoft consoles have never appealed to me, so I have no need for these products.

PS. My thoughts on downloadable content for all three consoles for your further consideration…

“Virtually Physical”
[ http://www.1upgamers.com/virtually-physical/ ]

BFN,

fp.
(1upGamers Forums Moderator)