Yes, but MM consolidates them. Also, Googles services are very buggy, laggy and just frustrating. For PC users, I understand that Windows itself is much worse so Googles faults can be seen as improvements. I use both Windows, Mac, Android and iOS everyday for work. I'm no biased to one platform.
Dropbox only offers 2GB for free. For some people, it may be enough. But to match MM, which offers up to 20GB, you need to pay extra. So not the same.
Gmail is horribly implemented and is very messy. If I send emails from iPhone or iPad, it will group them into different sent mail boxes. Same with from my computer. Frustrating when doing business and need to access a certan email sent from my computer on my iPhone.
Their calendar is both ugly and hard to use. For free, it's very good. But I'd rather pay a bit for something better. Same with contacts and everything else they offer. For free, it's very good. But MM is much better and rightfully so since it's paid.