Not quite :
the ability to build C/C++ plug-ins for your HTML/JavaScript/CSS apps
It would depend on how much C is allowed - if Java can be just a stub, and the SDK is easy to use (with proper Windows compilers), then it would be nice to see support. If it's like Android, then too much time would be spent trying to get it to work.
One advantage over Android would be the SDL and OpenGL support that Web OS has...
The downside is that Palm isn't as large as it once was, and thus could be seen as a slightly risky strategy... It would all depend on what manufacturers support it...