Microsoft took responsibility for RROD, that console design was a mistake (even with the power brick unattached).
Yes the hard drive made you roll your eyes, but this is a console that introduced group chat, and online service with little to no issues (security breach on PSN).
Was the 360 revolutionary in a few ways? Yes.
But so were other consoles for other reasons (of their time)
NES - Set the Standard controller design (saved gaming from 80s crash)
PSX - Made disc gaming an industry standard with enhanced gaming visual and audio presentation
N64 - Set the blueprint for 3D gaming and analog control in a 3D space (and force feedback)
Dreamcast - Brought the Arcade to the Home and made Online gameplay a reality
XBOX - Perfected Online gameplay/online gaming community
Etc. etc....Even consoles
After Xbox 360 set industry standards or innovations...