The future of these companies, facebook, google, microsoft (skype), and *apple to a lesser extent lies with unified messaging. The first company that can provide a seamless easy to use, cross platform unified messaging system will probably end up the winner. What I cant seem to understand is why google is so slow in implementing something, they have G+ hangouts, google talk, google voice (some countries), google sms in most countries on most networks, and of course gmail, which is huge. If they can somehow combine all these platforms into a single unified messaging system they would almost certainly be victorious.
Then add google glass to the mix, and you'd certainly become huge competition for even samsung and apple. Who would seriously carry a phone if nearly everthing can be accomplished by talking to your intelligent glasses - who knows, maybe even include a small bluetooth keypad / touchpad / touchscreen for controlling your glasses. It can even have gyro capability and anything else you would miss from your phone...or at least provide an app on any existing smartphones...
EDIT: *typo - added apple