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.
5 new examples; bug fixes
Improvements to timeline audio tracks; bug fixes
Optimised tweens & timelines; scripting updates; SDK updates; bug fixes
Hotfix for r272
New 3D effects like Fog; improved Android keyboard handling; bug fixes
Hotfix for r271
New sub-layers feature; effect compositor updates; bug fixes
New effect compositor with improved effect features; bug fixes
Timeline audio tracks; web adverts; lots more updates
Bug fixes