Unless they had another battery in the headset itself (more weight), there isn't really another way to do it. The choices they made all make sense (though I'd prefer support for arbitrary desktop apps, which I'm assuming won't be a thing).

If I do manage to earn enough extra cash to justify the cost, I'll likely get a significantly bigger battery and rig up a pouch or mini backpack or something for longer portable use when I want to do that. But there is a reason they're sticking to a proprietary connector. It means you can do all the power regulation in the block and just receive it where it needs to be on the part on your face, which means less weight.