Tactile wand for the blind

Here is an example of a design solution to a non-problem:

It is an electronic version of the white stick used by the blind. It senses obstacles and provides feedback to the user through buzzing.

It is a worthy exploration of an idea for sure. But is it viable? Is it really an improvement over the existing solution? The comments on Gizmodo (where I spotted this) pointed out certain challenges that seem to indicate a negative.

Just because we can make something with newer technology does not mean it will be better or more practical. Design problem exploration exercises aside, designers need to seriously think about the wider implications of the products they are developing.

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