It looks like the Xbox One is nearing 40 million consoles sold worldwide.
While previous reports from EA claimed 29.4 million Xbox One consoles have been sold through 2017, industry analyst Piers Harding-Rolls of IHS Markit had a summary of the Xbox One event before Bethesda’s showcase revealing a much higher number. This was posted in the live blog on The Guardian:
“Microsoft ended March 2018 with an Xbox One installed base of 39.1 million compared to 76.6 million for Sony’s PS4. While, Xbox One X has sold well, Microsoft needed its E3 showcase to deliver on first party studio output and its platform exclusives to reap the marketing benefits of the technical and power advantages of Xbox One X over the PS4 Pro. The showcase did not disappoint, with a total of 18 exclusives revealed and on show, and the return of many fan favourites including Halo. Based on this showing and other third-party announcements, it looks like early 2019 is going to be very crowded for game releases.”
A difference of nearly 10 million is quite a bit but as of now these are the closest we have to the install base for the Xbox One worldwide considering Microsoft has moved to reporting engagement over hard sales in recent times.