Many technologies fall down to obscurity only to be rediscovered later. This is especially true for IT technologies where concepts are thought of well before time, but the supporting infrastructure is simply not there yet. One of these is the Opera Platform from the Norwegian company Opera.
At Google I/O in 2016 there were two browser focused technologies from the company. These are the Polymer project and Angular 2. It might be a bit hard to make sense of why the company is investing in these two overlapping and competing projects.
Riot is a lightweight library for building user interfaces. It springs out of the Muut project which is similar to Disqus, for example. This is why the library is needs to be lightweight and work with a lot of other technologies.
The name GraphQL might suggest that it's a language for working with Graph Databases, similar to SQL for relational databases. But GraphQL is actually a technology that is meant for high level communications between applications that can (but don't have to) connect to a Graph Database.
Headless CMSes have been a hot topic for a number of years. In addition to pure platforms that offer a content API, there are also numerous CMSes with a public API that can be used to power a rich front end application.
Directus is a new player in the Content as a Service field. With many options for available for decoupling with a headless CMS, there is an abundance of options out there for people and organizations looking for a robust Content Platform. Is Directus worth a look and what advantage does it hold over more established players?
The logic and complexity of web applications has largely transferred to clients. Still you need a backend to persist your data, do validation and so on. Reindex a new entry to the BaaS market, but it has embraced GraphQL from the beginning.
With Falcor and GraphQL the wealth of custom built application REST API specific APIs is fast coming a thing of the past. What is still missing is a general purpose layer library to use these protocols in your front end applications.