At what point do flash drives replace Discs?

[bluearth]

Its not too hard to find a 64GB flash drive for $20 or under. 128GB drives, possibily big enough for 4K, are under $40.

Not too bad when 15 years ago 128mbs of transportable memory cost you $100.

IF studios moved to releasing their films on flash drives, would the extra production of such products force the price down enough to make such a move reasonable?

Getting rid of disc drives means much smaller, quieter, cheaper players.