You might not know that, but I do. You can't get free electricity. The power has to come from somewhere. This power will be you.

You are transferring energy already with the movement of the clothes, but the addition of electricity will require more energy. The only way for this to happen is either stronger wind or power diverted from somewhere else, like your speed. Just like generator hubs. You might think that because the wheel is already turning, it is free energy. Nope, you need to supply more power to keep the same speed. This technology is in use already. Honda uses the production of electricity to slow the car down in its hybrid cars.

The article you pointed to also shows this. I think it was a train station in Japan uses the power of the people walking over a plate to produce electricity. It might seem like free energy, but it isn't the people walking are supplying the power, this requires them to either slow down or push harder.

If the movement of the clothing can be efficient to power an iPod while walking, that would be good, since the the energy required would barely if at all be noticed by the walker. But for bikes, it is six of one, half dozen of another in regards to hub generators.

My point was why wait for some new technology when we already have one that does what you want, a human powered generator.