Is WhatsApp tackling spams and fake news with this feature?
Given that WhatsApp has been plagued with spam messages and fake news, with this labeling of forwarded messages, the chat service may be looking to help its users differentiate between mass-forwards and one-to-one texts.
Moreover, by not letting people disable this feature, WhatsApp is essentially giving users more clarity and lesser control.
As noted before, the feature is initially available for beta testing. However, you can try out the feature by downloading WhatsApp beta version (2.18.179) on your Android device via the Google Play beta programme.