My mom has new laptop, newer than my imac. she spent most time work on her course in her den in basement with wire connect. Then she broke her leg and stay first floor for while. She complain that her wireless are slower than her wire so she stole my wire since it is closest one to her laptop in dinner room. I use wireless for 5 weeks now and show little problem.

overall, I think Wireless won't impact on gaming too much but it is nice to have solid connection all time. Sure u can do airport stuff. but I still prefer use wire. or try to buy airport card? dpend on what desktop we talk about. I recall that most mac since 2005 has airport card? I have to look this up later..