Moggymoo - I think you've confused two similar looking products. Affordable Rents will be aimed at the current social rent waiting lists - just more expensive than they used to be.
Intermediate Rent and subsequent products such as rent-to-buy are aimed at people looking to get on the housing ladder and have a different application process.
Arguably it will become hard to differentiate between these products in the future accept for the aspiration/ability of applicants to purchase. Even this feels like a thin divide.