I think that Amazon will continue to grow and Netflix will continue to grow fast as it gains popularity as a cheaper alternative in emerging markets. Facebook need to die the horrible death that it deserves. Google is anyone's guess. It's a behemoth that may still grow in unpredictable ways e.g. we may all be driving Google cars 10 years from now. But I worry about the censorship and agendas being pushed on Google - it's certainly not neutral!