At this point, most of the features have been revealed so the only "new" announcement's will be games. Of course, if you can't get a Switch because every damn pre-order is taken (like me), that's a different story. So what are you waiting for?
Personally, a new Animal Crossing or a new Super Smash Bros would totally convince me to buy the Switch. Other people may be waiting for a specific game, price drop, or added feature.