With specific hardware companies, it's hard to say you can't live without them, because if they aren't making something, another company would. Is it more a general question about whether you can live without, say, computers and phones?
It's hard to imagine someone so sad that they can't live without facebook. I guess that's easy to say if you've never really got into it.
For me, I'm leaning towards Google for the information aspect. They also own YouTube, which is pretty important. You basically can learn how to do anything on YouTube. I'm a DIY type. Although I hardly live on YouTube like some people, it's nice to know and important to me that it's there when I need it.