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.
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
Hotfix for r265
Import animated images; Z scale; usability improvements & more