All good points. (And my figure actually assumes 10x faster and no loss of time between clearing wells and capturing photons -- i.e. 90% of time is spent capturing photons and 10% is spent clearing the well with no downtime -- to be generous. And, again, just to equal current performance.)
The underlying idea is sound -- storing bits is a linear problem but storing photons is an exponential problem. Of course you're still going to have to dump exponential amounts of energy... (So forget the "unbounded" part.)
The underlying idea is sound -- storing bits is a linear problem but storing photons is an exponential problem. Of course you're still going to have to dump exponential amounts of energy... (So forget the "unbounded" part.)