Here da ting do:
If we spend more money for R and D of solar panels we could probably make them less expensive and longer lasting and one day we could also see those theorized window solar panels which would be really good if they were long lasting.
Just think about it, in about 20 years of real electric car development we have already made everything the same or better compared to gas cars. Just imagining me what 20 years of solar panels development will bring us to.