If it gave a 35% improvement, it would be an almost universal small gain. If it gave you a 25% improvement, it would be a good candidate for one place or another that face unusually high land or labor costs.

But no, at 20%, I don't believe anybody will want this. Maybe in a decade that changes, but not right now.

1) Solar panel hardware costs are typically in the ballpark of 20-40% of solar farm costs.

2) You've assumed the panel costs double, which is likely false.

3) solar generation costs have been falling exponentially and upgrades are incorporated into various installations and new developments all the time.

Probably will provide significant benefits at higher latitudes. Especially where there is snow and panels are mounted 45degrees plus.

But here near the equator where view of the sky is the only thing that matters, they are a non-starter. Perhaps in solar farms where panel mounting is 4m or higher?