M$ will have problem not because of the ISP will replace them, but because people will easily download software, and they will nolonger have as much the distribution advantage as of today (interm of bundling). If downloading OpenOffice takes 3 seconds, then users would much more likely to download it. Ofcourse, computers must also be much faster to have it install in couple seconds, and start up quicker. If not, then M$ stil have the advantage of being more seemingly integrated.