These aren't new, though the approach to them seems quite clean.
> automatically enables version management
There's syntax sugar in the decorators for supporting versioned api's, sure.. but you still need separate functions for each version. I think the wording oversells the feature a bit.
> and is way faster then Flask / Django at handling requests
In what configuration? Pretty much anything is faster than Flask's included development server. Is it faster than Flask configured with nginx over wsgi? If so, how much faster? The best way to convince people of this is to not only post benchmark results, but also commit the benchmarks themselves so people can run them.
Project looks neat but Flask is well though out, well supported, has amazing documentation, and supports both Python 2.x and 3.x.. which leaves little reason to switch (with the exception of the CLI interface.. which I can't deny is pretty darn cool).
> These aren't new, though the approach to them seems quite clean.
This is really the crux of it, nothing is new. That is before Flask etc you could do everything you can do with Flask now, but the approach was bad and not clean. Required a lot of duplication of work. Flask helped fix that. You can do the hug enables through flask now, but the approach isn't clean, they require a lot of duplication of work. Hug fixes that.
The same reasons people started using Flask are the same reasons they should start using hug. It provides a cleaner, faster, and better base for the APIs of the future - just like Flask did when it came along.
I'm not that interested in RESTfullness, but rather easily navigable API through auto-completion. E.g. /users/save/ would become "Users.Save()" in JavaScript/TypeScript, with interfaces.
Would it be silly to use both Flask and Hug?
PS: how did you create the gif with the code?