Location of the cable modem?

When we started our service last year, I wanted the modem installed near the PS3/TV so I could run a network cable directly to the PS3.  I was not able to be home when it was installed, and the technician put the modem by the computer.  Meanwhile I get 1/4 the internet speed at the device that needs speed the most.

Is there any reason I would NOT want to move the modem away from the main PC?

The PC has a wireless adapter, so connectivity is not an issue.  I am seriously considering having the modem moved, but I want to know if there are any issues that this could cause.