Has the success of computers reduced the stature of chess as an 'intellectual' sport/game? As human beings, we know that there are different aspects of intelligence. Often, innovation and creativity are considered to be higher levels of intelligence, whereas the ability to calculate is considered to be a lower level of intelligence. Mere calculational ability alone does not imply intelligence. For example, even a top scientist may not be able to compute the square of an 8 digit number, but a computer would be able to do it in a fraction of a second. However, a computer cannot do many of the things which humans are capable of, like invent a new device, or discover new science. It is a credit to the human intelligence that he is able to invent a device - the computer - to do things he would not be able to do ordinarily, just as other devices such as cars, aircraft, etc. have been invented. 

Computers don't use real intelligence for playing chess, they just calculate millions of moves until they find an advantageous combination. Does this prove that chess is just about calculational ability and does not really involve any real intelligence?
Firstly, I think it is fallacious to consider chess a measure of intelligence (even though that is the general view). Chess ability, like almost any other skill-based activity, is a function of hard work and dedication far above raw talent. Wikipedia has an entry on this topic (http://en.wikipedia.org/wiki/Chess#Chess_and_intelligence) - researchers have found that there actually exists a somewhat inverse relationship between chess ability and intelligence amongst novice players - the reasoning being that smarter chess players do not work as hard on their skill as their less-gifted contemporaries - and in the long run, hard work pays off.

Secondly, you have to consider that computers and humans play chess very differently. Where a computer engages in millions of raw calculations, humans rely more on experience and pattern recognition to evaluate positions. The fact that computers can beat humans are essentially meaningless, as we are not comparing a like-for-like ability.

To say that chess computers have diminished the human skill of chess is, in my opinion, equivalent to saying that auto-mobiles have somehow diminished the skill and ability of marathon runners.