Google Docs isn't even in the same league as MS Office. GDocs is basically slow, web-running (I mean that as an insult), glorified Markdown editor that saves your data in an unknown format somewhere you can't access directly.
About the "features average person needs" remember that users adapt their workflows to the featuers you give them and make do, not the other way around. Give them more, they'll use more.
If somebody out there has a reliable way to measure resource consumption in Windows (Mark Russinovich?), I'd be interested in a comparison between (say) a thousand word document in Word and the same document in Google Docs in Chrome.
I think you could probably add "resource hungry" to your description of GDocs....
It chops off a solid 30-45 minutes of battery life on my laptop, in Safari (to say nothing of Chrome, at which point it becomes a campfire on my lap), so yeah, I think so.
About the "features average person needs" remember that users adapt their workflows to the featuers you give them and make do, not the other way around. Give them more, they'll use more.