In his own sport, yes, very capable, and to be fair it would be a closer/different prospect if Floyd was to fight MMA rules. McGregor's MMA skills count for little in a boxing ring if he can't use them. Resilience to pain/punishment in the boxing ring just makes you a punch bag, (see Eubanks Jn...
Not sure about the assumption that people watching this won't know about boxing or MMA. Some people, who are not interested in either may be drawn to this 'show' because of the insane hype, but there will be a lot of boxing and MMA fans watching this with huge interest. I am a boxing fan, not so...