Since I really never got into ecto collecting and I don't really feel like getting any rubies and sapphires, I'm hoping (amusement-wise) for a big *BANG...OUCH!*, either when it is announced rubies and sapphires won't be for armour (or for jewellery/in town clothes for that matter), or when the game comes and people realise it for themselves. Still, I guess if you wanted to and had the money you could buy yourself a reasonable number of rubies and sapphires, but not too much. A reasonable amount. This would mean if they did have a use for your character's looks, you would have a head start and had bought them when they were cheaper. Or you could try to get ahead on info and quickly sell them for a good amount before the price crash kicks in, as everyone becomes informed of what you got informed of an hour or so earlier
But then, I think its about 75/100 that people's anticipations about rubies and sapphires are true, and 25/100 that they aren't.
Whatever, it's all quite exciting - I could imagine Tyrian newspaper headlines, 'Panic selling of ectos as anticipation of coming ruby and sapphire armour value rises' Dudladudladun. 'Hundreds of collectors distraught on Lions Arch streets as ectoplasms soar off the market'. The great depression.

And then, the second depression 'Rubies and sapphires will not have armour value, say officials in Lions Arch', 'Prices of rubies and sapphires drop by over a half in just two hours', 'Thousands go on riot in Lions Arch as rubies and sapphires are thrown away by merchants', 'Rubies and sapphires to be used in Guild Hall upgrade purchases', 'Another wave of ruby and sapphire purchasing', 'A look back at the the economic depressions of recent months, special report by Magi Malaquire', 'Dragon Dust - the next armour essence','Thousands stock up on Glittering Dust after announcements that new Dragon Dust will be made from it', 'Glittering Dust price reaches 10,000 gold a pile'...uhm...that will be it for creativity.