The recent ruling on employers/businesses in the EU being allowed to ban overt religious/political signs/symbols like headscarfs will probably have an impact on Sikh turbans as a company can claim they want workplace with no religious clothing showing to create a neutral one size fits all policy.
It would obviously have a negative impact on already discriminated and prejudged Sikh men of south asian background/ brown skin with facial hair and on top of it them not being allowed to wear their own turbans.