This is a nice infographic that reflects how Boeing thinks about the future of the industry.

I've put both the 2013 and 2014 versions for comparison's sake (the 2013 is way better designed, don't know what happened with 2014, oh well).

Two trends are striking: Asia Pacific is where the growth will be. And single-aisle planes are what airlines want (160 seats seems to be the sweet spot). 

Damn, I love those very big birds though.

You can check more details on Boeing's website.