GPS time already forgoes the use of leap seconds, and as a result, just in the time that GPS time has existed, the wall clock time we know from the rotation of the Earth, slowing due to the drag caused by the lunar tides, has drifted fifteen seconds from the time GPS keeps through the use of its atomic clocks. Hardware and software that displays wall clock time, but which synchronizes to GPS time, has to keep track of those missing leap seconds and add them back in. If such a change were to be made, it would mean UTC would be completely abstracted away from the wall clock time we use on a day to day basis.
Is this a good thing, or a bad thing? I don't know. But it sure as heck is not a minor thing. I got into the study of time for two reasons: it turned out to be critical to many of the products I've worked on in the past two decades, and much of the software I've used gets it wrong. UTC diverging from the wall clock time we use to manage our systems will only make this harder.
I've added an update to my 2006 article on date and time keeping "Does anybody really know what time it is?".