Peak Design is a favorite company of mine and they recently announced on Kickstarter a new bag. Called the Roller Pro, it is a 22-inch 4-wheel bag which can be used as an airplane carry-on bag for cameras or non-camera loads. The video which I've posted below is quite entertaining to watch and shows a truly innovative bag unlike any other carry-on bag that I have.
For some of my future trips, I plan to use this as a carry-on bag along with the Peak Design Everyday Backpack to get my bulky camera gear to my destination.
I have ordered the bag and expect to have it by August.