> Old concept... see TI-99 sidecars and PC-Jr. expansion modules.
Well, duh. Daisy chaining is an old concept. See electricity.
Anyway, this has multiple issues: the longer it gets, the less stable it is. You can't disconnect something in the middle. One port has limited power. The plugs will have to be built-in to devices, or you will have to carry a bunch of adapters. Etc.
However, the idea is better than nothing, and better than the status quo. Heck, even the right angle is a huge improvement over your average usb connector that wants to break off if you tug on it...unless you wanted it to bend the other way.