But there is one very important way that power and data networks are similar: the provisioning of equipment must consider the maximum permitted peak load, even if that level is rarely reached. This is why the power company encourages its customers to conserve power during peak hours. It's certainly not because it doesn't want to sell more power but rather that it doesn't want to provision the equipment to support that extra demand.
Similarly, the wireless ISP is worried about having to install extra equipment to handle peak usage. And, by the way, this equipment we're talking about is local cell stations, which means that the overprovisioning problem is greatly enlarged because each station must be provisioned for the anticipated peak usage at that station.
As users, we see the value in high-bandwidth applications, such as video. And, it's certainly true that as these applications improve, more people will be attracted toward their use, and the number of such applications will potentially explode, especially if there is no mechanism for the voluntary restriction of usage by the user.
The real question is whether users are willing to pay the true cost of unlimited data plans, given the realities of overprovisioning requirements. Of course, the alternative question is whether users are willing to accept occasional bandwidth degradation that might occur due to the underprovisioning of local cell stations. Either we need to pay for ubiquitous quality of service or accept the degradation that we now sometimes experience. The real complaint is that we want the QoS without paying its full cost.