Wii Sports is way more advanced than Duck Hunt.  Duck Hunt had 3 ways to play, that were all variations on the same thing, and didn't keep high score, or save your skill level with your character, or have 5 different sports, or training modes with trophies to win, and a daily fitness test.

So how is the more advanced game a tech demo?  Because it doesn't have online or a narrative with a boss and an ending?  Because Duck Hunt had none of those.

The differance is Duck Hunt and Mario were both full games for their time period. Mario64 had state of the art graphics and was a full game with several levels to beat and items to unlock. The game was twice to three times larger then WiiSportsResort will be. Your comparing a game that pioneered 3D gaming to a game that shows off a new gadget.

As for Duck Hunt much like Mario it was a full game at the time of its release. It featured state of the art visuals for the NES and while you can argue it was a tech demo it wasn't. But in the end Duck Hunt got bundled with SuperMarioBros because Nintendo decided it wasn't good enough to be a stand alone game.

Today games feature dozens of levels and various unlockables. A real game pushes the hardware both visually and innovatively. A tech demo is something slapped together to show off new technology. How it works it is made cheaply and quickly so that the developer has something to show off.

Example if Microsoft and Sony operated like Nintendo is operating now. We'd see a wand collection bundled with the PS3, featuring a sword play level where players hit lifeless avatars with a sword. Or we'd see the Sony Paint program. Or how about the Microsoft paint program? Those were tech demo's heck we might not even see Milo as he was really a flashy tech demo.

Nintendo produced a ton of tech demo's to show how WiiMotionPlus will work. They created it to inspire developers and publishers and to show everyone what their doing. WiiSportsResort much like WiiSports before it was made cheaply and bundled with the new hardware to show off its capabilities. Not to sell as a stand alone game.

I for one will likely not buy WiiSportsResort for that very reason, unless it has a budget price. If not which judging by EBGames.com etc...etc.. it will not then I will likely wait for RedSteel2 or a better looking game bundled with the hardware. I'll get WiiMotionPlus when theirs a game supporting it that I actually want to buy. Not just buy it for the sake of buying WiiMotionPlus!