As you might have heard, the first early adopter release of APEX 5.1 is out. You can sign up for your own workspace at https://apexea.oracle.com/ to try it out.
The major new feature of APEX 5.1 is the interactive grid which merges the popular interactive report features with the ability to actually change data. My users love the interactive reports in APEX 5.0, so I am looking forward to seeing how the interactive grids will work in practice.
Note that this is the first early adopter release, and Oracle has published a long list of things that don't work yet. But it is definitely good enough for you to play around with, get a first impression and start considering how you will use the APEX 5.1 features in your applications. Just don't try to run the EA in Internet Explorer...