Perhaps this should be moved to the existing thread on the HHonors Reserve card in the Hilton forum?
In any case, it has been reported in that thread that Citi will be sending out physical certificates. Until someone actually receives the certificates, none of us will know how the reservations will work or what properties are excluded. Some members have already met the spending threshold and have had their statements close (myself included), so I would expect that we will have reports soon.