well, because frankly dc couldnt handle it. dc has only a 200mhz processor and 8 megs of video ram. All of the emus on dc run in the windows ce environment which runs much slower than when the dc isn't in it. Plus, the total ram of a dc couldnt fit many of the best neo games in it. On pcs, if they dont have enough ram, the emu creates vram, or fake ram on the hard drive, which the dc obviously can not do. The first console that will be able to emu the neo is xbox.