Unfortunately, I don't think so, at least not for serious commercial development. Android and the Web both have big drawbacks for producing profitable apps.
Apple has a huge line of people with their credit cards out on the App Store and everyone knows it. Android has relatively few users and they are not known to be big spenders in general. The Web has lots of users but very few are likely to ever find your product and unless it fits in a few well-defined categories it's tremendously unlikely they'll be willing to pay for it (and ad-supported is not a reliable business model).
That's subscribers. I was talking about app sales. The two aren't necessarily corelated all that strongly - which is kind of my point. I remember one study recently that estimated Apple was responsible for more than 99% of all mobile app sales: http://arstechnica.com/apple/news/2010/01/apple-responsible-...
Apple has a huge line of people with their credit cards out on the App Store and everyone knows it. Android has relatively few users and they are not known to be big spenders in general. The Web has lots of users but very few are likely to ever find your product and unless it fits in a few well-defined categories it's tremendously unlikely they'll be willing to pay for it (and ad-supported is not a reliable business model).