One ring

the notion of a personal computer become obsolete, to replace him gradually personal reality. Glasses of augmented reality replace the monitor.
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But, the idea for a potential device that replaces the mouse, and using, for example, 8pen and the keyboard. Of course, also the mouse can be replaced by tracking the gaze and keyboard — voice control, but lacks something tangible. And what could be more tangible than the fingers. It remains only to learn to read their information. The first thing that comes to mind is a sensitive gloves. But there is a little better ring to capture the sound of friction of his fingers. Expected to get dressed on the right the average and be similar to this picture from Wikipedia.

The principle of operation is the following. From a sound stand out and recognized patterns of movements(taps and swipes) that in the present state of AI should be quite feasible. But patterns aren't everything. Why not go ahead and make a full UI for manipulating multidimensional data. Natural and intuitive abstraction is a two-dimensional sheet — screen.
And we have as many as 4 pads that are suitable for this role, and the thumb as a pointer. But my mouse was scrolling. And he has not got anywhere, spent the index finger on the inner side large, here and scroll. In addition, you can think of a lot of special gestures. By clicking, e.g. to open a search.
To connect the ring to the parent device, such as a phone or tablet via bluetooth. Also, this device can take over part of the computing or storing patterns. Although, if the phone to be replaced every few years, and the ring is much rarer, it is wise to store the patterns, and therefore making the most of computing on it.
The main problem is the food. Hence, the main limitation on computing power, not at all because of the small size as it might seem. Possible solution — charge from vibrations or incoming signal(as some RFID), there is also wireless transmission of electricity.

Of course, the device must be personalized, configured for a particular user. But in unusual circumstances, these settings are not relevant. Then help automatic profile selection.

PS If one ring is not enough, you can wear a second, one hand to choose the tool, the second place where to apply it. Important, not only for draw apps, CAD systems, but also for many games.
P. P. S. the Offset on the screens and best personal Finance is relative, i.e. a specific point of touch is not important, important is only the trajectory of the displacement(like mouse gestures).
Addition. Judging by the comments, drew a class of universal wireless pointing devices: gloves, ring, magic wand, the "ball" and others.
Article based on information from habrahabr.ru

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