The D\O~detector has been undergoing a major upgrade in preparation 
for the high luminosity run at the Tevatron. This document reviews 
the components of the upgrade with an emphasis on the new B physics 
capabilities. Projections for the observability of the CP violation are made 
based on the upgrade simulation. It is shown that measurement of 
$\sin{\rm 2}\beta$ can be achieved at D\O~ with uncertainty below 0.1 for 
an integrated luminosity of 2~fb$^{-1}$.}