I remember being giddily mystified by that Windows CE logo when I got my first Dreamcast. Knowing there was a keyboard, mouse and modem all available for the DC, I reckoned somehow there might have been a way to run a bona fide GUI version of CE on a Dreamcast. If no official version was ever released, then maybe some ingenious homebrewer might figure out the trick. Alas, as far as I know nothing ever materialized on that front, official or unofficial, and the CE support was really only there as a development platform.