So what tech gear is popular now? Phones and tablets. Portable is "in," but what to do with portable that hasn't been done. Some group raised USD 8,000,000 on kickstarter for an Android game machine, an Android TV like Apple TV. It'll likely sell but I don't see a "wow" factor to it.
It almost has to be something that isn't out there right now or something that is out there but poorly implemented. This is something even Apple has a hard time doing, they wowed people with iPod and then built on it with iPhone and iPad, but they really only got the "wow" thing once. And getting the "wow" thing once made them the biggest market cap company there ever was....