Hello Aviv,
In a VC environment, if all APs are in the same broadcast domain (layer 2) roaming will be seamless.
As of today, If some APs are behind a routed switch (layer 3 adoption) then roaming between APs on either side of the switch will
not be seamless unless a fully fledged controller (NX/VX) is used.
Regards,
Chris
Christoph S.