I wouldn't say that was cheating. It's not like they've got the books sat in front of them. They are simply using one of the many advantages of being a modern computer - huge and fast memory capacity.
But whilst the fact that computers are now better than humans at chess is interesting and impressive, it doesn't really matter in terms of things like the world championship.
Machines can beat humans at all manner of competitive events - plenty of vehicles, and probably some robots, could go faster than Usain Bolt for example - but that's irrelevant when it comes to discussing the Olympics.
But whilst the fact that computers are now better than humans at chess is interesting and impressive, it doesn't really matter in terms of things like the world championship.
Machines can beat humans at all manner of competitive events - plenty of vehicles, and probably some robots, could go faster than Usain Bolt for example - but that's irrelevant when it comes to discussing the Olympics.