Street photography is often still shot in black and white. For black and white enthusiasts the thought of a dedicated black and white sensor is genuinely exciting. For most of photographers this has to now been unaffordable. There’s been a medium format digital back from PhaseOne available and Leica have a range of cameras.
Ricoh have now announced development of a dedicated black and white Ricoh GR compact. This will please a lot of street shooters, and I may just have to have a look at the Ricoh GR again.