The client doesn't matter.
Consumers will never download a client. Never, ever, ever. The standard qt client is for pro miners only - and completely irrelevant for normal users.
I don't agree. Many users and especially security sensitive users and users possessing a big amount of funds favor local wallets. That's just a fact.
And it's not just an online wallet, it's an online mining app too. Look again at the "mining" interface I posted a screenshot of.