Ethereum lets you have simple scripting over ethereum transactions, and I think Slock.it is an meant to be a "locking mechanism" on top of that, so one can only

Ethereum lets you have simple scripting over ethereum transactions, and I think Slock.it is an meant to be a "locking mechanism" on top of that, so one can only guess (because they have no-info web pages too, just like dao!), that this is a more comprehensive and sophisticated block chain programming model and higher level services than ethereum, but I can't really tell for sure.