I haven't played Wii Sports Resort, so I don't know what this new control will bring. But I reserve my judgement for later. Many complaints with TP Wii, was that the controls were gamecube controls with 'waggle' functionality. These controls are completely focused on the Wii, so maybe they are better and maybe they are worse. Who knows. The only thing to do is to wait for it to come out.
The reason why they didn't show anything during the conference, is maybe because they just finished the concepting stage. And more than quick artwork cannot be shown. Why they didn't wait until the next E3 to reveal anything? (Vitality Sensor)