I wouldn't be overly concerned about this as you can have multiple devices connected to the same IP or in the case of this server multiple IP's on the same device. Yep I'm a IP hog.
I need them though. The router in between directs the traffic to the appropriate place. The amount of devices connected to a single IP is really only limited by the hardware you have AFAIK. Rationing of IP's may be a possibility but that is the farthest I can see this going at the most.
For example if you have a cable modem connection the modem is connected to the router, all traffic for the IP you have been assigned is first directed to the modem them directed to the router. Connected to the router can be multiple computers, game consoles or whatever.