Intel Quits OLPC

Well, the Intel and OLPC partnership is over now - Intel quit this partnership over "philosophical differences" with Nicholas Negroponte. Could it be the child-centered nature of the OLPC, or the open architecture, or something else? Competition of different devices is cited by some articles, requiring only one device. My personal bias is I want more kids to have laptops, having seen the power and possibilities of self-directed learning when every child a laptop or tablet.