In each level, you will be able to collect alot of diamonds (which are currency), and in each level there is a Page (which is often hidden) you need to finish the level to be able to keep those objects (to save)
To access a new world (chapiter), you will have to go to the shop to buy a chapiter which will require X ammounts of diamonds and pages. (which will make the player have to visit sometimes a level several times if he has forgotten to get a page or doesnt have enough diamonds)
Despite rumors Eternity's Child Wiiware is not in limbo, that version belongs to Alten8, so they release it when they want
We may open a beta-test for people, in a week or 2. Only a few people
What else? well for steam, the updates that will be on it (if the game sells well, so its worth doing updates) will be very different, not just new levels and worlds and scenarios, but also a kind of creation mode (not like Little Big Planet), think something different, something that doesn't make people compete but that makes them team up together
I was hoping to see another more recent video as well, but it would be awesome to be included in the beta.