GameStop plans to open 400 stores this year on top of the 6,450it already operates worldwide. That is up from 388 last year, and in 2008, it rolled out 674locations.Landlords likely love a rapidly expandingretailer, especially during these times. But is there any concernthat it could eventually face a fate similar to Blockbuster?We've heard arguments on either side. There is someconcern out there that GameStop could get into trouble if gaming starts to make a shiftprimarily to an online platform. If this becomes thenorm, gaming companies could cut out retailersaltogether.Thiscommentator makes a strong argument against GameStop losing groundto Gamefly, its Netflix-like competitor, saying that amail-in service for games isn't as relevant as it is for moviesbecause gamers like to hold on to the software for a while and playit numerous times.Meanwhile, GameStop doesn't appear to be in anyfinancial trouble. The retailer took in fiscal-year earnings of$377.3 million, its second-best performance ever, though they weredown 5.3% from the prior year, and same-store sales fell 7.9%.Doesanyone see any risk in this ever-expanding retailer, or are thedoubts out there premature?ALSO:Wall Street Puts Boot Into DSW