Heard a similar question today, related to my post on "Override READ_COMMITTED_SNAPSHOT with READ_COMMITTED." Question was - what is the impact of NOLOCK when RCSI is enabled for a database.
Here is the demo script I sent, showing the behavior with and without NOLOCK for an RCSI enabled database. Basically - you'll see uncommitted data modifications with NOLOCK as you would if RCSI was not enabled:
SET LastName = 'Stevens'
WHERE CustomerKey = 11004
-- Returns Johnson
-- Returns Stevens