Add short summary of supported features

And a list of the ones coming very soon!

Author: rosa

README.md

@@ -2,6 +2,8 @@
 
 Solid Queue is a DB-based queuing backend for [Active Job](https://edgeguides.rubyonrails.org/active_job_basics.html), designed with simplicity and performance in mind.
 
+Besides regular job enqueuing and processing, Solid Queue supports delayed jobs, concurrency controls, pausing queues, numeric priorities per job, and priorities by queue order. _Proper support for `perform_all_later`, improvements to logging and instrumentation, a better CLI tool, a way to run within an existing process in "async" mode, unique jobs and recurring, cron-like tasks are coming very soon._
+
 Solid Queue can be used with SQL databases such as MySQL, PostgreSQL or SQLite, and it leverages the `FOR UPDATE SKIP LOCKED` clause, if available, to avoid blocking and waiting on locks when polling jobs. It relies on Active Job for retries, discarding, error handling, serialization, or delays, and it's compatible with Ruby on Rails multi-threading.
 
 ## Usage
@@ -238,7 +240,7 @@ class ApplicationRecord < ActiveRecord::Base
 
 ## Inspiration
 
-Solid Queue has been inspired by [resque](https://github.com/resque/resque) and [GoodJob](https://github.com/bensheldon/good_job).
+Solid Queue has been inspired by [resque](https://github.com/resque/resque) and [GoodJob](https://github.com/bensheldon/good_job). We recommend checking out these projects as they're great examples from which we've learnt a lot.
 
 ## License
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).