Some of my favorite ones are

- Exponential view for a fascinating insight into the world of tomorrow through today's developments in emerging technologies

http://www.exponentialview.co/

- "The download" by the MIT Technology review - great and brief newsworthy tidbits

https://www.technologyreview.com/the-download/

- For well-curated and high quality content revolving around blockchain topics, definitely "Token Economy"

https://tokeneconomy.co/

I personally find the FutureCrunch newsletter to be both positive and very insightfull.

https://futurecrun.ch