He is 40 years old, charismatic, a patriot, he is building a persona so he may well be the future leader of the country. But he is a Russian first and I don't think as far as foreign policy goes he will be different from Putin. In the position of leadership all things change and reality sets in. His current support comes from the well heeled Russians especially the young ones. 
The current leadership of Russia will not last for ever people will want change. But for now Mr. Putin is perceived to be doing a great job by the majority of Russians by wide margin.