Perhaps for some AWS services (ECS, etc). But I would still stay on amazon for all the other surrounding services that are crucial, SQS, S3, occasionally DynamoDB, Lambda.
I would love to have managed k8s on amazon. It wouldn't move me away because of all those surrounding technologies.
It's only a matter of time until these AWS primative replacements are mature within Kubrnetes, which is definitely a good thing.
AWS is wonderful, but you always have to have tooling ready to not be held hostage by a vendor. And any vendor will hold you hostage once they have enough market dominance or enough of your business.
A great many of those (but not all, I admit) have equivalents on Google Cloud. I know I am somewhat biased (as I work there) but the technology is really great. BigQuery is untouchable. Spanner is magical. CloudML is hands-down the best offering. Etc.
Have you ever considered "what if I didn't presuppose AWS?"
I would love to have managed k8s on amazon. It wouldn't move me away because of all those surrounding technologies.