Radical liberals are like a cancer in our republic. To think 0bama is going to have up to 3 Supreme Court nominations and who knows how many other federal judges is indeed frightening.
What makes you think he is restricted to three? If he has Congress on his side, he could increase the size of the court to whatever size he wants (the number 9 is a statutory number, not a constitutional number).
Google the Judiciary Reorganization Bill of 1937 to read up on that one.