That sounds more like a sweeping statement on your part.
Of all the Michael Jackson discussion I've seen from casual fans, I very rarely see anything regarding a future concert release. I'll see dozens upon dozens of comments about the quality of his dancing, or how one specific performance (typically a one-off like Motown 25 or the 1995 VMAs) is all sorts of incredible, but you'll only come across legitimate demand for a concert DVD/Blu-Ray from the hardcore fan base. And we, sadly, make up but a small fraction of overall MJ fans.
You don't see
Live in Bucharest or
Live at Wembley returning to the charts at random intervals. You don't see casual fans engaging in hyped conversation over the prospect of a future concert release. There simply isn't the demand for it on a substantial level worldwide. That's not a generalization; that's an observation based on general sales numbers. And even if the world did grow interest in such a release, the current bias against lip-synching would become an immediate issue, and anything released from the History tour would be torn to shreds, which would undoubtedly damage Michael's title as the greatest performer of all time.
Also, these artists you mentioned are not really known for their live performances in the same way as MJ does who was first & foremost a live performer/dancer.
I wouldn't say this is accurate. Of course Michael has a reputation for being one of the greatest live performers to ever live (if not THE greatest), but you'd get various answers if you asked people, "What would you say Michael Jackson was best known for?" Some would say his music, some would say his vocals, some would say his eccentricities, some would say his dancing. It's a person by person basis. My girlfriend, for example, knows the legacy of the Motown 25 performance, but has never seen it.
Matter of fact, this would be an interesting poll to make within the general public. If someone had any pull in a large media organization, it would be nice to see exactly where the casual fans stand on this one.