I see this offering up NASCAR the same fate as the former ASA series.
The sealed LS1 package that ASA ran seemed like a great idea at first. The teams were supposed to be issued ECMs which they were not allowed to tamper with but, to no ones surprise, the bigger teams always ended up with tuned ECMs and in some instances got away with it for quite a while. There were many reasons this series went under, but the lack of true competition was definitely a contributing factor.
I believe that fuel injection is a far superior technology to carburetion, but it's going to be a alot harder to keep everyone on the same playing field IMO. It's realitivly easy to tear a carburetor down and check all the components as opposed to checking lines of code in an ECM to make sure NOTHING has been changed. With the money that the top teams pour into R&D and engineering it wouldn't be a stretch to say they would find a way to cheat the system even more so than they do now.
It will be interesting to see where this goes.