Some of the companies that run the telecoms networks over which Joost and other bandwidth-hungry services hope to run are less confident that the internet's foundations are ready to bear the strain.
Pilotless planes require more people on the ground, are slow and vulnerable, and hungry for satellite bandwidth.
无人机不仅需要更多的地面人员，而且速度缓慢易受攻击，并且需要卫星带宽的支持。
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In 2009, the us Federal Communications Commission warned of a looming spectrum crisis: because our mobile devices are so data-hungry we will soon run out of radio-frequency bandwidth.