SegataSanshiro on 28 March 2017
Well they learned from the early failures of PS3. Also Nintendo and MS fucked up pretty badly. So it's a combo of the two. MS handed E3 to them at E3 2013 where I believe Sony after hearing the XBO price last minute lowered the PS4 price. Top that off PS4 had a great marketing leading up to the launch plus Taco Bell. XBO marketing I don't even remember and Wii U? Did it even have marketing before launch?
