Did Germany just lose a key asset?

Germany have nationalized the oil company Rosneft Deutschland as well as RN Refining & Marketing GmbH. It’s just been on the news over here, but for anyone interested in energy, does anyone else think this is a big deal? Rosneft is apparently Russia’s largest oil producer, and Germany is going to control the company that refines Russian oil.<br><br>Anyone got any thoughts on this?