For those of you getting "mad" at him because you happen to already know about physics and he does not, he could have simply been on vacation or not have been on the forums. Just because he did not realize this update until a few days ago, does not give people the right to 4chan him to death (LULZ, QFT, Fail, Welcome to last month). Its amazing how on this community, people think in order to be respected they must treat people like stuff. Now im all for someone who is just being a complete idiot and has had previous warnings, but someone who is just curious about an update he just read. Just answer his loving question and get over yourself.
NOW! Yes physics is an update for blockland, not sure when it will occur. People think it will be christmas day as a present, but im not so sure. Physics is just simply that on fake kill or real kill of bricks depending on its placement or the force in which kills it, will act naturally like a real brick in real life. Not much of an update but something rather really cool to look at or have fun with. Such as landslides like you said. If you have anymore questions Id suggest looking through badspot physics preview topic, many questions have been answered there.