1) Deep learning / data science works really well in Python
2) Lambda functions are really great in Python... maybe people will choose to write servers out of Lambda functions instead of writing high performance servers in Go - who knows?
Those are big areas, but still a small percentage of all programming work falls into those two categories.
Python is an imperative language by nature, and lamdba is very uncomfortable to use for anything than a simple expression. You can use functional elements up to a certain degree, but it will be a pain if you try to force it to be a functional language; you simply can't go very far with it.
Hah, if you had told anyone that five years ago they would have been very confused. "What are you talking about? Lambdas in Python are horribly neutered..."
Back to what you actually meant, I think that lambda functions will get simpler to use in every language, and I think JS will extend a lead there even though I prefer Python as a language.
I should get my "microservices built out of spreadsheets" project (https://6gu.nz) onto AWS Lambda to get in on the zeitgeist though, put a horse in the race. And then somehow get deep learning (and the blockchain...) in there to really cash in on the bandwagon trends.