One problem with eSports and the Olympics is that Olympic games tend to be relatively timeless. For example, wrestling or shotput seem like much more natural fits for the Olympics compared to Starcraft 2 or the latest League of Legends. It would be weird if patches, new releases, and private companies fundamentally changed the Olympics.

I also think games don't belong in the Olympics. I would differentiate games from sport by saying that games are purely mental exercises - that is, if I only knew which chess move to make I could play chess perfectly, whereas I may know exactly what to do in a sprint (run as fast as possible) but still couldn't sprint very well. Thus, chess is a game (purely mental/decision making) and sprinting is sport, which requires not only that you know what to do but that you physically can do what you know you need to. eSports are much closer to the "game" end of the spectrum, allowing for things like "Can you physically move your mouse with such precision and react in time".

Well the sport I do (badly) is fencing, and although it looks the same from afar it does change quite a lot