Comment by kurthr

PCBs and antennas in general are cheaper than glass. I think that's why this is considered special. Also note that they can do UWB and all sorts of other things. It's not like these glass antennas are using a substrate that already exists, they're just mounting something with exposed wires to a semitransparent 1ft/3ft piece of expensive specialty glass. Any change they have to do to the low e windows, they have to do for both.

The idea that a plastic enclosure is difficult, expensive, or fiddly, is kinda hilarious. Maybe you'd like your monitor or laptop or microwave oven to have it's fiddly enclose removed, but I don't think it's wise.