I'm sadly (regrettably, even) right there with you. Wii is still my favorite console of the last 10 years, but it's a dusty wasteland relegated to backlog-clearing status these days.
I know there's a lot of Wii U fans out there, and a slate of potentially awesome first party games coming down the line, but at this stage in the Wii U's life it's just not a console I need to own. Seeing Ninty continue to gimp the Wii and ignore it is very disappointing- Reggie made a reference
the other day to Wii as a good console for "late adopters" with "significant advantages"... but most of those advantages seem to be Wii BC on Wii U, rather than any kind of support for folks who are late to the party.
PS2 was a force to be reckoned with far into the PS3's lifespan, and really was a true competitor to both the Gamecube and Wii- Sony didn't just throw out table scraps and then turn their backs while they promoted their newest Big Thing, they sent ports of major titles for YEARS (heck, Pro Evolution Soccer 2013 released in Oct 2012!), not to mention releasing amazing revisions every couple of years that were lighter and thinner. Wii hardware, on the other had, got... shamefully downgraded. First we lost gamecube BC, then Nintendo released the nearly- useless (but absolutely beautiful) Wii Mini, a Canadian & EU exclusive SKU that couldn't go online, didn't have an SD card slot, doesn't play Gamecbe games and only has composite output... none of the hardware revisions to Wii have done anything to offer "significant advantages" to late adopters, and outside of a few Nintendo Select releases, there's been a craptastic
modest release of games that would draw gamers into the Wii since 2010.
I don't like bashing on the Big N, they're the only company still making games just to have fun, I love them dearly and still wait anxiously for everything they publish like a kid nervously trying to sleep on Christmas Eve, but it's hard not to find more to complain about than rave about these days. Letting the Wii slide into second class status so apathetically has soured my taste for their products, plain and simple.
Luckily, I've still got a NES, GB, SNES, GBA, N64, Gamecube and Wii sitting around to whisk me back to Nintendo Nostalgialand whenever reality gets too depressing.
 seems an appropriate place to leave this: