Xiaomi's latest high-end offering, the Mi Note.

It’s been a very interesting week in the world of Android, with everything from juicy rumors, to product announcements, to billion-dollar acquisition talk.

Samsung Brand Shots CES 2014-4

We take a look back at 2014, the challenges that lie ahead, and ask what’s at stake for Samsung. Will the Galaxy S6 turn its fortunes around? How will it cope with the competition from Xiaomi and others.