I'd say we're certainly going to see crazy advanced cheese strats - ones that humans wouldn't be able to hope to pull off. This could definitely be done with computer micro and wouldn't be defendable with human micro.
An example would be moving probes around in such a way to maximize their shield regen - or switching the top clickable unit while stacked - who knows...
But if that's all the AI can do, and people know it, then defending should be pretty easy. Any worker or land-based rush can be fairly trivially defended by walling off.
An example would be moving probes around in such a way to maximize their shield regen - or switching the top clickable unit while stacked - who knows...