A win for web developers, in my humble opinion, as the rendering engines converge. With open source projects like WebKit, why do we need so many proprietary engines competing with each other? It creates more target environments for all the web developers and designers around the world to repetitively test.
This is a great example of how platforms, when open sourced, can beat proprietary silos which fuel the engine of capitalism. While the competition between proprietary silos, together with the copyright + patent protections they require, does drive innovation forward, it does it at great cost (in the amount of litigation required to protect the IP, in the lack of interoperability, and the increased cost for everyone producing for multiple platforms). By contrast, an open source project can develop much more similar targets that have incentive to interoperate and accept contributions from others. For example Linux variants, and now WebKit and its derivatives.
This is a great example of how platforms, when open sourced, can beat proprietary silos which fuel the engine of capitalism. While the competition between proprietary silos, together with the copyright + patent protections they require, does drive innovation forward, it does it at great cost (in the amount of litigation required to protect the IP, in the lack of interoperability, and the increased cost for everyone producing for multiple platforms). By contrast, an open source project can develop much more similar targets that have incentive to interoperate and accept contributions from others. For example Linux variants, and now WebKit and its derivatives.