DDR Hottest Party is a lot more exciting to me, but they didn't show it. Perhaps they didn't want to take anything away from WiiFit (which wouldn't have been hard!) DDRHP looks really fun and also, from already playing DDR on PS2 and GC, I know it will be a great workout, even more so with the Wimote/nunchuck integration (i.e. arms). In contrast, WiiFit looked boring, and as said by another above, even the demoers looked bored to tears with it. Not a good sign. Not to mention that it didn't work well at all! Still, it will have its market if they can make it work right. For one thing, I imagine my wife might actually like it. She absolutely does not like video games, she won't even play DDR, but she might like WiiFit. Which is precisely who they are trying to market it to.
WiiBoard probably would be great for skateboarding/snowboarding/surfing. They should have had such a game to demonstrate as well, thus targetting both casual and core gamers, instead of just casual.
Oh, and I am looking forward to Zelda on the DS. Looks great.