Reverse rolling backpack?
 

This makes so much sense to me and I never saw a rolling backpack doing this: if the backpack is rectilinear and opens up like a suitcase then there's not really a big difference between front and back so why not put backpack straps on one side and rolling equipment on the other? It would take make a much, much more comfortable rolling backpack.

It seems the weight of the hardware (wheels, handle, etc) being spaced so far away from the back would create a torque/moment (force multiplied by distance from pivot point) and make the bag carry/feel heavier than it is (your back is constantly compensating/fighting the torque/moment). Also, it makes it harder to have smaller front accessory pockets since they'd have to fit in/around the handle.

done here...............

And also http://shop.eaglecreek.com/flip-swit...pack-22/d/1237

Also this http://www.ebags.com/product/ebags/t...arry-on/316162

They are 7-8 lbs, which kinda defeats the purpose of a backpack.

This has a really nifty way to attach a removable backpack strap to as many as five points by using the front pocket. This is not emphasized anywhere on the product page. You can see this on youtu.be/ozHZydF_beU?t=3m55s (the stupid forum will try to embed it and it can't be embedded and also loses the timestamp so you need to copy it into a browser URL sorry) the relevant part is only about 85 seconds long.

To necro this: I bought an Eagle Creek Morphus International last year. youtu.be/oaRyVuLuWOw?t=145 again just watch twenty seconds. It was a textbook case of "shut up and take my money" moment for me.

(This year, since I haven't travelled for over a year now (guess why) I have repurposed the travel budget into a bag budget and could afford the Beruf 2x3way. But that's a different topic. However, now my bag flexibility is through the roof.)

A regular backpack and a rolling bag form into a rolling backpack. It's like Voltron LOL.