There's definitely more than one way to skin a cat, so maybe it's not just the "TJI" or this or that, it's a bunch of little things here and there that start adding up to a lot. What I'm saying is that this is only part of the puzzle a lot of these combustion technologies work much better with forced induction(or diesel engines), and with these MGU-H's there is a lot of control over air intake and turbine back pressure. There's not magic bullet, it's a synergy of different techniques, all working in the aim of maximizing combustion. You also have a source of electricity, a source of heat, there's a lot you can do with this as well.
Say the TJI works, but it works even better when you inject the fuel in a super critical state, and works even better when you use a turbine to maximize the benefits of lean burning, and works even better when you add custom fuel to take advantage of this, and works even better when you have the full support of an engine manufacturer to play and try things.