Good list. I'd just add Polkadot in there as well (after writing this comment I noticed I skipped your final paragraph that talked about Polkadot haha).

Cardano and Polkadot look to be the two big movers and shakers of the crypto world in terms of new networks, both presumably becoming fully operational later this year. Personally I think Polkadot will be much more important for the future of crypto due to its unique capabilities, but Cardano has got the larger hardcore hyped up fanbase for now and I think that hardcore fanbase will fuel it to be like a mini-Ethereum and take a decent minority of the smart contract marketplace. By next year I expect these two coins will solidify the #3 and #4 spots in the crypto market for the forseeable future.