Never say never
We also used to say, that PS4 and x86-based developing was a no-go. Voilá - enter Playstation 4 and its x86-based hardware; much easier for programmers to deal with, than the predecessor's CELL-based architecture (that weird PowerPC incarnation).
Before Kaz Hirai took the position as CEO, there was talk about porting the PS Vita OS to other devices, such as smartphones and tablets. As it is, these rumors have subsided, and personally I find it MUCH more likely, that Sony would make a next-generation hand-held console, based on Android than anything else.
Many don't know it - but actually a lot of digital cameras and TVs, actually uses Android.
And with Android will probably come HTML5 and WebGL and all our dreams will come ever so true