Sinar had the Sinar/Rollei Hy6 going for a while, to cover the MF SLR part of the range, and now they have a MF view camera and the LanTec architectural camera, mainly aimed at users of MF digital backs.
But really, I don't think Leica needs to claim to cover everything. They are part of a company that markets luxury products, so they'll market Sinar as a luxury product as well. Can I get a bellows for my 8x10" P with Louis Vuitton logo leather now? Non-metering back, please.