Charging distance and power are the two bottlenecks of Qi wireless charging

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Charging distance and power are the two bottlenecks of Qi wireless charging

For mobile phone to use wireless charging, charging distance and power are the two major bottlenecks of using Qi. When can this problem be solved?

The power levels are increasing gradually. That is simply a matter of time. The first wireless chargers delivered 2.5W. Now all chargers deliver at least 5W, many deliver 7.5W, and some deliver up to 15W. The number of 15W chargers will grow and then the first 20W chargers will appear.
Power over distance or through the air is a completely different matter. It will never be possible to charge all phones in a house by installing a single charger that delivers power over many meters through the air, like one Wi-Fi base station delivering Internet for the whole house. The problem is that transmitting power through the air is very inefficient. You need to transmit huge amounts of power (hundreds of watts) to deliver 5W over just 1 meter! And that makes it unsafe as well as inefficient. Power through the air certainly is possible, but only at very low power levels (microwatts). It will never be enough to charge a phone and we will only continue to see this exist in token, one-time proof of concept live demos and not in commercial application because of the safety and energy inefficiencies I mentioned.