This is similar to GitHub and Twitter. Both grew out of the web, but have increasingly acquired or built desktop clients, not to mention mobile ones. And Facebook has made an about-turn on HTML5 everywhere and focusing heavily on native mobile apps.
So I see a trend is that cloud-based services are realising they can't just rely on a website. It would be great to see the web catch up, or even close the gap, but right now, native is offering so much more capability, that both web and native apps are necessary for prominent cloud services. That's good for users, they get the best of both worlds, but also going to be a big challenge for resource-limited startups.