I specifically said that we do not know how it will be done, but...when money is involved, it will be done eventually.
Nobody knew how an airplane was going to fly 100 years before they flew.
But an airplane operates because it obeys the laws of physics. A non-"onerous" DRM requires a violation of physics (specifically entropy). The inclusion of DRM increases information costs, which can be paid in money, time (either yours or the processors, or restricted usage. Those are your only options, wishful thinking aside...