If it is reliable and rational then ICC can certainly will accept it. But as far as I know they are not willing to extend the match. It is not possible for them to take a match to another day. Because there are many kinds of expenses and the schedule of cricket has to be changed. For which they may find this method more suitable. Obviously, they are trying to discover better method that will be more reliable for the cricket world.
I highly doubt that they are actually trying to discover anything which will be better than the DLS system. And as long as there is not much protesting or anything made against the DLS system, ICC is not even going to improve that system either. And the one thing people have to realize is that when the DLS method was introduced it was very good for that time. But time has changed and the system also needs to be upgraded.
If someone personally or any institute or their students doing anything for this then surely no one can give updates because this will come when they will launch this all and if we expect from ICC then I am sure it's 100% they are doing nothing about this because they have no enough time for this all.
DRS is surely a good idea and nothing complicated happening with this all even we still need few things to implement in this technology era, but these all depend on approval from BCCI which is currently controlling all main points for this sports authority as they are currently not implementing any technology related thing in their domestic set up even they are most rich in cricket world due to expenses so how can we expect more changes and thing related to cricket can part of this without their approval as they are now looking for just own profit.