It means Bioware and Pandemic games will get more funding and will be available on all available platforms, as EA has classically supported any channel of milking the public of its money. I'm not very well-versed on the deal (though will be soon, thanks to some Bioware friends in Edmonton), but as long as these two companies get to keep their own development processes and define their own development cycle, I don't think the quality will drop at all. Look at Irrational Games- they were amalgamated into 2K, and still managed to crank out one of the best games of our time. Granted, the PC version has some major authentication and DRM-related bugs to work out, but the core gameplay is still genre-defining.
We don't have anything to worry about.