I assume you are refering to the recently spoken about FTTH. Your telco will provide you with an ONT (Optical Network Terminal) that is typcially mounted outside your home. The technology that Telecom is going to provide is GPON, the ONT of a GPON network typcially has a 100 or GigE bridged ethernet connection (ie no router in the ONT), two POTS interfaces for 1 or 2 phone circuits and presumably a F connector for Cable or Satellite TV should they offer that.
As I said most GPON terminals dont contain a router, and are simply a ethernet bridge with each ONT assigned one or more IP addresses. Therefore if you want to provide multiple PCs within your home a normal NAT router with a ethenet WAN port can be used to provide this service.