Here is my prediction/popularity history for Tamagotchi:
Release up to 2006 - THE most popular new trend.
2007 - popularity starting to wane
2008/2009 - popularity basically gone, TamaTown replacing Tamas
2010 - popularity different in each country, but in UK and NZ at least, almost fully gone
2011/2012 - ridiculous sales, popularity has fallen a lot
2013 onwards - TamaTown shuts down, Bandai America stops selling Tamas, Bandai Japan continues but making prices so high nobody can afford it
Don't kill me for predicting TamaTown's death or near death so soon, or Tamas in America having such a sudden fate, but I'm afraid we've got to face the facts: Tamagotchi's death might be in less than five years. I know it seems so unrealistic to all you older Tamagotchi fans, but...well...you WILL kill me for saying this, but there isn't anyone left to be heartbroken when Tamagotchis are discontinued. Except us tiny handful, us one per cent of the fans they had when Angelgotchi was released. Soon most of us will give up to all the new gadgets and there will only be five people left who still use Tamas. That is the way it will be, eventually, and we can't stop it because we are such a tiny percentage of the world's population.