The new iPad seems good, but it doesn't seem to be a huge step up from the iPad 2. The retina display and improved camera are nice features, but there isn't anything on it that makes me wish I'd waited to get the new model instead of buying one in December. As for the whole gaming debate, I think that iPads are great if you're looking for a small, light device to browse the web or watch films on. However, I do not consider my iPad to be a gaming device. There are some great games which really use the full power of the device, such as Infinity Blade and there are plenty of other fun games which are reasonably priced. When it comes the games you can get on the likes of the 3DS and PS Vita, the iPad is no match.
All in all, if you mainly want a device to browse the web on, then the iPad is great. If you want a handheld gaming device, get the 3DS or Vita.