No war for us.
There are several chip vendors working on strategies now. My understanding is that a circuit board will be introduced quickly but it will violate the warranty of the printer to install it and turn off the chip recognition. That is being done now on certain of the high end Epson label printers as well as the lower cost label printers that were employing new chip technologies.
For a refillable cart, it will take time for a chip to be designed. Maybe a year or more for these - unless there is a breakthrough that can get around the inability to write back to the chip a date and other critical informations.
A lot of OEM customers are taking the 15-20% ink trapped in their OEM carts and recycling it. You and I both know someone that is fueling a community printing center by reclaiming Epson Pro inks.
This is just an opinion, but sooner or later a consumer group will get on a bandwagon and raise hell. I think that they went through this originally with Ford Motor Company and that is why the Sherman Anti-Trust Act exists - and we are not buying Ford Oil for our F-150s. 15-20% wastage in an "empty" cart is probably what will get consumers upset and the OEM can raise prices when there is no competition.