Those require a power supply. A usb miner would definitely be more appealing for beginners/hobbyists.
Frankly, beginners/hobbyists are just wasting their time if they're messing around with miners at this point. Of course, a market may exist for such a novelty item nonetheless, but...
Same things were said when the asicminers old USB miners were being sold. And it was probably true. Didn't stop them from selling like crazy.