http://www.vox.com/2014/5/16/5717674/obamas-plan-to-let-putin-hang-himself-is-workingThe lesson that Putin is learning is that Russia depends on the global economy, whether it likes it or not, and the global economy doesn't like it when you go invading other countries and tempting the richest nations in the world to maybe consider sanctioning you. This is actually a significant change for Russia, which at the height of its Soviet power was not integrated into the global economy and so didn't have to worry about things like investor sentiment. But now it is and it does.
Вкратце - санкции действуют, дальше хутин не пойдет, но Крым в ближайшее время не вернут.