docs: update readme for Q3 2019 (#16430)

Author: jelbourn

README.md

@@ -27,15 +27,14 @@ and which pieces are blocked) and make a comment.
 Please see our [`help wanted`](https://github.com/angular/components/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22)
 label for a list of issues where we could use help from the community.
 
-#### High level stuff planned for Q1 → Q2 2019 (January - June):
-* Most of the Angular Components team is on loan to the framework team
-  helping with [Ivy](https://blog.angular.io/a-plan-for-version-8-0-and-ivy-b3318dfc19f7).
-  We've been using the Angular CDK and Angular Material tests to validate code paths as well
-  as helping debug issues in switching Google applications to the new rendering pipeline.
-* We're also working with the Material Design team on a strategy to collaborate more deeply.
-  We'll have more to share on this once our plans are further along.
-* Assorted bugfixes and minor feature improvements.
-* Design for API enhancements to the tree component to improve ergonomics.
+#### High level stuff planned for Q3 2019 (July  - Sept):
+* Creating both test harness infrastructure in `@angular/cdk/testing` and
+individual harnesses for the Angular Material components.
+[See the checkbox harness as an example](https://github.com/angular/components/pull/16334).
+* Continuing to create new, API-compatible versions of the Angular Material components backed by
+MDC Web ([see @jelbourn's ng-conf talk](https://youtu.be/4EXQKP-Sihw?t=891)).
+* Rework ng-update schematics to no longer use tslint in order to resolve performance issues.
+* Continued work on switching our build from gulp to bazel.
 
 
 #### Available features