Excellent post!
A few years ago, on this side of the Atlantic, we thought that Sergio would have had 7 or 8 Majors by now.....
I don't think Tiger will equal or surpass Jack's Major total
BUT
, ironically, that's because of Tiger himself!
I'm not a big fan of Tiger but he raised the bar so high that anyone wishing to compete with him had to take raise game to his level and now, so many have done so! The reason that those other guys are so good is very much down to Tiger. He'll be the victim of his own success, in a way.
With regard to McIlroy and Spieth, their rivalry has the potential to be the next big one but I'm not sure that it will be. At present, I don't think McIlroy isn't playing enough competitive golf to be the player he could be. If I were his sponsors, I wouldn't be at all happy with how few tournnaments he plays.
Spieth comes across as a nice kid on the course and in interviews. Rory only seems to do it in interviews. He has a way to go with his demeanour on the course.....