Dan Larimer's announcement today is alread mixing up the markets for EOS. The last 4 hours Binance transaction volume for EOS/ETH increased to a max. of the past 3 months:
https://medium.com/eosio/eosio-dawn-3-0-now-available-49a3b99242d7
"500 ms Block Interval & BFT DPOS
With Dawn 3.0 we have moved from a 3 second block interval to a 0.5 second interval"
This is an incredible performance benchmark.
When it comes to inter-blockchain operability, it seems like Eos is departing from the sidechains principles towards a light approach:
"From our perspective, inter-blockchain communication is nothing more than having the ability to implement a light client as a smart contract. A light client is able to validate transactions from a blockchain without having to process the entire blockchain.".
From my perspective it is questionable how a Nash bargaining equilibrium and as a result a secure transaction confirmation can be achieved through such a light client implementation. Therefore still holding to my original hypothesis: EOS will have the best blockchain performance at some security costs, whereas Cardano will have the best blockchain security at some performance costs.