There have been lots of folks speculating about cruise prices because of coronavirus. Don't expect a ton on inventory to free up in the coming weeks, as people change their "I'm going to cancel" tune when they realize they're not getting money back, and any remaining inventory may be slower to move, but it's still a small number of cabins.
Where you can keep an eye out is sailings that have just hit final payment. Cruise lines look at what percentage of people drop reservations at this time (remember, different lines have different policies here), and if they see higher churn than usual, that'll be a sign of weakened demand.
There may be some cheaper W coast sailings later today too...