According to a post on the Battle.net forums, Blizzard plans to limit the number of games a player can create within a given timeframe to combat the use of bots. The company did not detail the number of games, nor the time frame in which players would be limited - that roast is still in the proverbial oven. Whatever the parameters are, this change will happen in the "near future."
Blizzard goes on to say that when the change goes live they want user feedback on it - presumably to fine tune it so that the restrictions are fair and don’t ruin the game experience for players.
"Once this change goes live, we're looking for your feedback to help ensure that the limit is working as intended. If you encounter the ‘Input limit reached’ message and feel you should not have, please let us know how many games you were creating and why. This information will help us ensure the limit minimally impacts legitimate players while still protecting the game against bots."
"We'll continue to tweak the game limit as necessary, as well as continue to go after the few cheaters and botters that are out there in other ways. Our goal is to help ensure that Diablo III continues to be a fun gaming environment for all of our players, and we're looking forward to hearing your feedback on this change once it goes live."