I only see marginal improvements. Solar has major drawbacks that efficiency improvements cannot address. Solar does not provide baseload power although solar thermal can spread power usage over longer periods at a cost. Solar requires expensive transmission capacity and backup capacity. Solar output declines substantially in the winter. Solar power generates only small amounts of peak power as solar output declines in the late afternoon during peak power requirements.
Industrial solar power is boutique energy generation, built because of political influence on the utility industry. Large scale deployment of solar power is the road to an energy meltdown.
Some of the photocells they have been looking at can pull in multiple spectrums and double the efficency of current solar cells. Backup storage would be a way of holding onto energy harnessed during the day. Besides at some point no matter the energy source it’s going to make sense when Oil hits 500 a barrel.