IMO the original XBox was a rather ugly console (and originally even dangerous due to the power cord issue, which were recalled years after release due to M$ fearing pending lawsuits) and had a lot more in common with a cut-down PC. Its primary game was Halo developed by a company they bought which produced mainly high quality Macintosh games and before the takeover even supported Linux.
MSDOS made them big due to IBM's mistake to outsource its operating system development to Microsoft. It was one of the most limited and handicapped OSes ever release, written by a sole developer which tried to copy CP/M (today such a thing would probably have resulted into huge legal battles). Microsoft bought QDOS (Quick and Dirty OS) for 25,000 USD and rebranded it MSDOS.
IMO there's nothing particularly glorious about Microsoft's history as a company, except for the amount of profits they generate per employee. I think the XBox 360 is the least sturdy console ever released, but Microsoft doesn't want to provide consumers the actual figures so they can make a honest purchase judgement.







