I don't think that Bluray belongs to Sony. There is Bluray disk association f which Sony is of the "board of directors" along with LG, Apple, etc. I would be surprised if the next Xbox didn't use Bluray.
Indeed, most definitely not a Sony owned product

Director companies:
Apple Inc.
Dell Inc.
Hewlett-Packard
Hitachi, Ltd.
Intel Corporation
LG Electronics
Mitsubishi Electric
Panasonic Corporation
Pioneer Corporation
Royal Philips Electronics
Samsung Electronics
Sharp Corporation
Sony Corporation
Sun Microsystems
TDK Corporation
Technicolor SA
20th Century Fox
Walt Disney Motion Pictures Group
Warner Bros. Entertainment
"Technical Expert Group" contributors
Acer Inc.
Advanced Micro Devices (AMD)
Almedio Inc.
Alticast
ArcSoft
AudioDev AB
BluFocus Inc.
Broadcom Corporation
Canon Inc.
CESI Technology Co. Ltd.
China Hualu group Co., Ltd.
CMC Magnetics Corporation
Corel Corporation
Cryptography Research Inc.
CyberLink
DCA Inc.
Deluxe Digital Studios, Inc.
Dolby Laboratories Inc.
Dreamer Co., Ltd.
DTS, Inc.
Eclipse Data Technologies
Fraunhofer IIS
Fujifilm
Fujitsu Ltd.
Funai Electric Co., Ltd.
Gibson Guitar Corporation
Industrial Technology Research Institute
Lionsgate Entertainment
Lite-On IT Corporation
Macrovision Corp.
Marvell International Ltd.
MediaTek Inc
Meridian Audio, Ltd.
Mitsubishi Kagaku Media Co.Ltd.
Monster Cable Products
Moser Baer India Limited
NEC Electronics Corporation
Nero AG
nVidia Corporation
Osmosys SA
Paramount Pictures Corporation
Pulstec Industrial Co., Ltd.
RealD
Ritek
Sensio Technologies Inc.
ShibaSoku Co. Ltd.
Sigma Designs
Singulus Technologies
Sonic Solutions
ST Microelectronics
Sunext
Taiyo Yuden Co., Ltd.,
Testronic Laboratories, Inc.
Universal Studios Home Entertainment
Victor Company of Japan, Ltd. (JVC)
Visionare Corporation
Warner Music Group
Zoran Corporation
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