And to what do you sync? That is the point.
Well, you don't HAVE to sync to use the iPad. You can buy and download music/video/podcast/apps directly to the iPad from the iTunes/App stores. I totally don't recommend this, because unless you sync, you have no backup, and if you have no backup, if anything happens to your iPad, you lose all your media purchases, and while apps can be redownloaded for free, it's a painstaking process to redownload them one by one. Oh, and without backup, you can't restore any app data once you redownload them -- you'd have to start over from scratch. But while not something I would recommend, it certainly CAN be done.