If you're interested in cutting edge Construct features try the Beta releases. These releases should not be used unless you are willing to tolerate some bugs.
Scirra Arcade exporter, design updates, and performance tweaks.
Animations editor mobile update, more UI updates + bug fixes.
Fullscreen start page, beginnings of NW.js exporter, and more fixes.
Event variables bug fix, new clipboard setting and more.
New 'Paste' option, new preview mode, and lots of bug fixes.
Start page and UI updates, and more bug fixes.
A few extra fixes from r18
Lots more fixes, and some more general changes and additions including a new origin indicator.
Loads more bug fixes!
Fills in some oversights, a few UI changes, and a lot of bug fixes again.