Well if you're a solo developer targeting browsers and mobile, I'd use Unity 3D (which went from supporting to abandoning Flash recently). It gets you browsers, desktop platforms, iOS, Android, Windows Mobile, PS3, XBox 360, and Wii -- not sure about the new Wii platform (does anyone care?).

The long term looks better on WebGL. And it's safer to bet your business on an open platform.

Adobe actually announced that they would be charging royalties on 3d games developed with flash. They backed off after developers pushed back, but it really shows the danger of using an Adobe owned platform.

Well, flash support on mobile is somewhere close to non existent and last time I checked the various flash 3D libraries (Away3d etc) the performance left something to be desired.

Yes, but you can export iOS and Android apps with Flash. The iOS browser still does not have support for WebGL.

Flash is dead. Adobe proved they weren't serious about flash when they announced licensing restrictions, 9% "revenue sharing" and hoops you have to jump through in order to use the "premium" 3d stuff. They eventually changed their mind about the 9% revenue tax after developers revolted, but the damage was done now that everyone knows they'd even think of doing something like that. And they drove the nail in the coffin (which Steve Jobs supplied), when they gave up on Flash for mobile.

http://www.forbes.com/sites/ericsavitz/2011/11/09/adobe-to-s...

"Flash Player 11.1 is the last release of the Flash Player plug-in for mobile browsers. Adobe will not add support for new mobile device configurations (chipset, browser, OS version, etc.). Adobe will continue to provide critical bug fixes and security updates for existing device configurations through September 2013, and will also allow our source-code licensees to continue working on and releasing their own implementations." http://www.adobe.com/devnet/flashplatform/whitepapers/roadma...

There is no future for Flash. Adobe's all about HTML5 now, they don't give a shit about Flash any more, and neither should you.

Unity3D went to great efforts to support Flash, and now they're sunsetting it, for good reason:

Unity wrote on their blog: http://blogs.unity3d.com/2013/04/23/sunsetting-flash/

We don’t see Adobe being firmly committed to the future development of Flash. This is evidenced by the cancellation of Flash Player Next, the instability of recent Flash Player versions and by Adobe’s workforce moving on to work on other projects.

By introducing, and then abandoning, a revenue sharing model, Adobe eroded developers’ (and our) trust in Flash as a dependable, continuously improving platform.

Developers are moving away from Flash, and while Flash publishing has gotten little traction, our own Unity Web Player has seen unprecedented growth in recent months (now installed on over 200M computers and already installed by 1/3 of all Facebook gamers).