Was reducing Sony's investment in the silicon/semiconductor market also KK's decision? He lost his job in the semiconductor division around the time Sony decided to go with Stringer so this always confuses me.
Obviously that wasn't KK's decision - you could be quite sure the opposite would have happened had he remained. Kutaragi at the point of Stringer's announced ascension was the head of three divisions: gaming, electronics, and semiconductors. Now - him and the rest of the world thought he would be the next CEO, and obviously those three divisions formed nicely a synergistic environment from which to push his vision of a networked world with Cell at the center.
But... in a sort of supernova announcement, CEO Idei basically wiped out the established boardroom and put Stringer up for succession. He viewed it as sort of a final act of defiance to get out from under the shadow of Ohga (a big KK supporter). KK lost his non-gaming titles as well as his chair in the boardroom.
Anyway, the decisions we talk about in Sony semi today stem from post-KK leadership decisions, and you can see why from that moment in time the stage was set for clashes with Stringer on any policy that didn't align with the company goals Kutaragi had been working towards in his assumed work-up to CEO.