Seems great opportunities for companies unsure of deploying it. Of course, still some years away of approval and other vendors support, but it might be an incentive for network engineers and decision makers planning at long term.

Usually one can always interoperate just fine with EIGRP with other protocols and vendors, usually with OSPF, providing it was well planned and engineered. Cisco design guides and architect professional career professionals provide very goo information about it. As of now, there is no reason to not consider using EIGRP if your large set up is Cisco.