Mobile phones: from ordinary to flip up, sliding and swivel, what can be the next big thing!?

Like they have changed lots but how can their be anything left to invent what kind of mobiles do you think we will have in 1 years time, 5 years and 10 years?
Answer
They will develop a mobile phone so small it could easily get lost up your nose if you sniff in while speaking on it. i reckon they should make a more discreet blue th head set.