Hello,
I could have sworn a youtuber I follow mentioned this game earlier this year, but I guess I didn't really understand what he was describing. As soon as I saw that trailer, my jaw dropped and I nearly peed my pants in excitement. This is exactly what I keep looking for in these kinds of games, and finally some people are coming through on what I expect.
Last year I got to be part of the bug testing for Empyrion before the release of the pre-alpha, and from getting to talk with those devs and listening to the dev videos of Space Engineers, this is basically what all those devs were imagining but haven't and probably won't for some time accomplish. The mechanics, the look, the feel, the combat, are all sounding to be superior in every way. I don't think I'll ever need another game like this if it turns out to be what they say.
I can't wait to find some similarly minded people around and playfully speculate on the crazy possibilities this game "may" allow...
BTW, I wonder if maybe some day they may implement some sort of advanced sound block that could allow you to modulate it in real time and play sequences of sound bytes, so then you could have in-game DJs...