By that rationale, why would anyone buy a flatscreen TV today, when they know they could wait a few months and it would be a lot cheaper?

exactly that sort of thing DOES happen though - particularly with goods that have planned obsolescence cycles annually, so I'm not sure it's even a good comparison in the first place TBH

Think of it more from a general level and on even bigger purchases like a house. Everyone stopping buying houses for a year because they think sitting on their own currency (regardless of interest rates and the housing market) will make it cheaper is not a good thing.