The main idea of the inception dream is the ability to implant or extract information from other people's dreams. In Inception movie, the process of intruding into other people's mind is being used in a remarkable (and fictitious) way. The question is whether we can "hijack" dreams of others and take an active part in it? Right now, probably not. It is just a movie after all. What we can do is to influence on others minds to think what we would like them to think in a long-hard way, using astral projection and some hypnosis and NLP techniques. But before you even start, you must watch Inception!