A lot of the purpose of studio monitors is having a somewhat accepted "standard" - I can hear a mix on JBL 4312's, Genelecs, Yamaha NS-10's or even one of the once popular little Auratone speakers in most any mixing room or edit suite, and have a pretty good idea how that will translate to Computer, TV, Stereo, & Home Theater speakers.
When I mix using my home stereo speakers, I hear a lot of stuff that doesn't translate into what the public hears, it sounds great, but not really helpful as a tool.
Jim C