I thought that there were many assumptions made, but no 'health warning' that these were assumptions.
one was that USD/EUR would go to 1.70; another was that unemployment would rocket; another was that there would be thousands of forced sellers; another was that there would be no buyers and it went on.
They forgot to include the possibility of global warming causing desertification in ireland, hence the country being uninhabitable; the possibility of global warming causing biblical flooding in Ireland, drowning all properties under tens if not hundreds of feet of water; the possibility of a nuclear holocoust causing the world to be uninhabitable and lastly, the end of the world, where all would be housed either in hell or heaven.
On a more realistic note, I felt that even if prices fall, it should not cause a problem unless one cannot afford the repayments and this can happen even if prices rise but some misfortune befalls the owner.
If there are repossessions and people forced from their homes, they must still be housed and so the rental income will improve.
of course, it will all come true somewhere some day - otherwise it would not be on the telly.