This is indeed still on track for 2.3! It is very near zero impact in terms of effect on performance but to protect those playing on less beefy machines like your toaster oven (there's nothing wrong with toaster ovens!) this feature will be off if the graphics quality preset is set to Low or Very Low.
This is a good question. Also, will this have any negative impacts on us players that play this on a veritable toaster oven?