Look at it this way.
Nintendo had an opportunity to bring a unique value to handheld gaming: 3D display. This is a value that smartphones -- now emerging as the most serious competitor to the DS in handheld gaming -- cannot easily duplicate. Nintendo needs to execute on this opportunity before somebody else does.
Does the Wii have a similar opportunity? What can Nintendo bring to the Wii 2 that isn't already on the market? Not HD output, or online ecosystem, or media functionality.
The opportunity is there for handheld, and it isn't there yet for home console.
"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.