I think you're right that the changes are likely to be incremental...but let's face it, change usually is. The step-changes in detailing (since I've been on forums since 2004) were mostly in the late 2000's, with coatings (including tire coatings), microfiber polishing/cutting pads, SMAT polishes/compounds, and the normalization of rinseless washing. Add to that gear-driven and long-stroke orbitals, and the later appearance of cordless tools. Maybe color-changing wheel cleaners needs to be added in there.
Of course it's hard to predict a "reinvention of the wheel", so who knows what we might see. One of the recent trends has been...let's call them decon washes, whether it be one-step, or "3-pH". I don't see these as being "invented" recently, just that their use has become normalized, just like rinseless washing was around for a long time before the appearance of ONR normalized it.