Google vs. Google

So, I'm finding a great difficult trying to discern the point in having a blog right now, besides the fact of creating my own entrances to share with ppl I care. Nowadays, google docs provides me with many ways to create my own documents online or presentations and google reader allows me to share any article i found on the internet with just one click. Picasa lets me synchronize and share my pics easily and soon google+ will unificate all those things. With that in mind, im trying to resolve if Blogger has some point to me or i'll just have to stick with google docs