There is a new TfL leaflet out mentioning a few changes:

Bus passes no longer need photocards from the 26th Sept

Tube tickets and LT cards are now valid on Silverlink from Gunnersbury
to Stratford, Custom House to North Woolwich, and Willesden Junction
to West Brompton.

Oyster Prepay may be available in the future on addtional National
Rail routes in future at different rates to the Tube rates.

Still no mention of capping.....