When added to the 40 percent known to exist in matter, this totals 100 percent. Now we just have to figure out what exactly is that dark energy. This was the tip of the cosmic iceberg. Cold Dark Matter is coming. The Hubble Space Telescope and its successor, the Next Generation Space Telescope, will take us deeper into space and further back in time to view the first stars.
Arrogance is pretty powerful stuff.
So probably not. There are the obvious worries-money and public interest in spending for an activity with no practical application, for instance. I doubt these factors will set the limit. Curiosity about the beginning has and always will be unlimited. I cannot resist mentioning that the father of inflation, Alan Guth, undertook a serious study of the creation of a universe in the laboratory and concluded that it is possible.