Evolution of our species continues and some changes in our anatomy are being observed even in the last 100 years of our history. The evolutionary pressure never stopped, it just changed its form. We are no longer competing with nature, we are competing with ourselves, adjusting our diet, exposure to seasonal weather, sun and fresh air, physical activities and mental challenges. I would say yes, we may have become more intelligent, even if we lost our connection to nature. We just use our intelligence for different things: our society, our language are much more sophisticated, our abstract thinking and creativity have advanced, some of us may have got more control over our bodies (I’m pretty sure modern athletes are more developed than our ancestors).