The iPad already has video out. And it does support memory card slots and USB for importing photos.

But I'm 95% certain that Apple would never put something as thick as a USB port or video out directly onto the iPad. They want to keep the base design minimal (and cheaper to build), and let the 10% of the market that wants the extra features pay for the clunky add ons. So, I'd be willing to bet a good $200, and give you 5 to 1 odds, that USB and video out doesn't come directly onto the iPad in the next year and a half.

Time to market is so crucial in the quickly progressing tech industry.

I phrased it poorly, sorry. Dropbox maintains a remote copy of your local dropbox folder. But this implies that you will have local copies of whatever is stored remotely; you still have your data if you're "off on summer vacation" and Dropbox happens to remove your account due to inactivity.

Dropbox maintains a local copy of all of your files. So you don't actually lose anything.