The computer is incredibly strong and there is no interest for a Man again Computer match but I wouldn't say it's close to being solved or that it's impossible to make further progress for three reasons:

1) Computer vs Computer can still go both ways so clearly the one chess engines make mistake others can exploit; 2) Some sequences are still hard find for computers, e.g. [1]. The long king walk by White is beyond the horizon of the computer. 3) Computer + Man against Computer + Man correspondence matches do benefit from human intervention.

[1]: http://www.chessgames.com/perl/chessgame?gid=1124533&kpage=5