Sudden Interest in WP8.1 from OEMs and ODMs?

OEMs:

Gionee,

HTC

Huawei,

JSR,

Karbonn,

LG,

Lenovo,

Nokia,

Samsung,

XOLO,

ZTE

Micromax, Prestigio and Yezz

BLU, K-Touch and InFocus and Obi Mobiles and Celkon

ODMs: BYD, Compal, Pegatron, Quanta and Wistron, Longcheer, and Foxconn

Does somehow these OEMs know that Android is too crowded and looking to get on the WP bandwagon first to dominate?

e.g Wonder if Sony is looking to join WP