If gaming is actually able to move from its niche and into a new one as a spectator sport, I think we can expect to see a change in industry goals.
As it stands right now, the money is in mass appeal. This means making games that are high graphics, newest generation of consoles, enveloping, and being open to all types of players. In terms of skill diversity, most games now are intended to be pretty easy to play, and quickly rewarding.
However, this does not make for a competitive atmosphere. The first game that comes to mind is the Super Smash Bros series. Melee (the second installment) was intended to be a casual party game, but Nintendo seemed to have accidentally created a fighting game masterpiece with a high ceiling for skill cap. Consequently, an intense competitive scene for the game erupted, and it became one of the largest competitive scenes in gaming. In response, Nintendo created Brawl, the third installment of the series. This game featured more random elements, slower gameplay, and the removal of most advanced techniques in order to slow it down and make it more accessible to people.
However, this was unnecessary! Melee was an incredible game because it could dual function as a competitive platform AND as a casual game.
To get back to the point– games with a heavy competitive scene are games with a high cap for skill and potential for players to become true masters of the controls. You can only be so good at a game like call of duty; most top tier players are really the same skill level. Where as in Melee, there were periods when one player absolutely dominated the rest. Showing that they were truly the best in their field. If the money moves from casual gaming, into the intention of spectator gaming, we can expect games to become harder and more skill based. The heroes of competitive gaming will truly be those who have mastered the controls, and they will be in a league of their own above the casual players.