OK but LunaNext does more than just UI, it will also interact with various hardware bits. Lots of LunaCE features aren't there yet but it's being worked on. The rewrite of UI, keyboard and sorting tons of bugs took a lot of time. Going forwarded adding the LunaCE features will be quite high on the list :-)
Those covers are like cards in webOS in that they run in the background when minimized to "card view", plus - if the cover/app supports it - there are toggles usable in "card mode" to interact with the app. Not every app has toggles nor needs them; thus not every cover needs to be fully seen.
Unlike webOS cards they can't be stacked/arranged/reordered... They auto arrange in a grid layout: left to right adding rows as needed. Last app used is always top left and the app positions switch as you use and minimize various apps.
Using the card metaphor of Luna makes more sense from a multitasking point of view. That's one of the things I loved about Luna CE on TouchPad. Like apps grouped with like in batches - or "hands" of cards. Easily cycling between each card in a "hand" or going back to the home screen to pick up a new "hand" to work with. It just made it easier to get things done. Everything was placed where you wanted it.
-- Sent from my TouchPad using Communities