And with the competition, Dropbox will focus more on monetizing enterprise users and in order to keep the individual users it will at least match the space that Google is offering.. So as far as I am concerned I am getting an Italian chef to cook my meal for the price of McDonald's..
You have a folder that exists on your devices, and the contents of the folder are automatically synced across all your devices. You also have a web interface that you can use to upload and download files. You have a certain amount of space and can buy more. You can share that folder or parts of it with others or teams.
Am I talking about Dropbox or Drive?
Because it is all about the details. Gdrive doesn't have all the applications for each platform, and it will take them a while until they will get it right (even if they just emulate).
And I think DB knows that and they're trying to acquire Android users (by offering free 3GB if you sync photos from your phone) before Google integrates gdrive in Android: http://blog.dropbox.com/?p=984