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Longi claims world record-breaking 34.6% efficiency for perovskite-silicon tandem solar cell
(www.pv-magazine.com)
This is a most excellent place for technology news and articles.
What matters is longevity and price per watt, first and foremost.
High-efficiency solar panels might be cool for spacecraft or other highly limited space installations, but generally it really isn't the absolute first priority.
I'm the big picture, maybe. On the other hand, there are plenty of cases where efficiency-per-size may be more important than price-per-efficiency given the available surface area to place a panel.