Decided to contact Amazon as we're 10 hours away from the expected delivery. Mr. Naveed tells me:
"As I see your order is in advanced stages of shipping, I expect it will be dispatched and shipped out soon.
As per the notes on the order, I expect it to be delivered by today, however there can be a possible delay of one day. The maximum delay, can be it will arrive by tomorrow"
Sooooo, basically what I was able to deduce looking at my shipping confirmation. Annoying for sure, but if it at least arrives sometime tomorrow I'm not that pissed about it I guess. Better than having my order outright cancelled I suppose.