The term Generation I think typically means 20-25 years, an era of a person born into early adulthood, at least I thought that's what it meant.
But in Pro-Hockey, I think the term can mean any player every 10 or so years if the impact they brought to the game was so special by position that it meant they would be remembered throughout history, or as the very elite of the elite.
The Hockey Guy has a good video on youtube search Generation vs Franchise Players
He talks throughout history what the difference is.
He said something pretty controversial I doubt many on here would agree with that Eichel has the potential to be Generational along with McDavid where-as Matthews is more of a franchise player, and he gives examples why. I found this strange seeing as while not a Leaf Fan, he goes above and beyond defending Matthews and the Leafs and claims they will win a cup in the next two or three years. One thing about The Hockey Guy is he is always non-biased, fair, explains his opinion in fuill detail. He had 70,000 subs almost now in just 2 years and covers everything daily, its his job now and produces news on everything hockey except trade rumors because he hates when they don't happen and he's not just a HITS HOG. He decided not to report on Ray Emery as he doesen't want to make money off tragedies. He's a classy guy who's followed hockey since 1980 and his knowledge about all 31 teams is incredible. He can tell you each prospect on every teams development, where it is how far they came, as well as history.
I completely agree that since Jack has played one full season, with a better team around him and a healthy year, Eichel could be a regular 90-100 pt player, but is that generational? I don't know. Matthews is borderline that now and the two's production isn't very far off. Well Eichel has averaged more points per game then Matthews since Auston entered the league (0.94 > 0.88) With way worse circumstances so it's not an insane opinion. I think when it's said and done Matthews and Eichel could join McDavid one day as Generational Players. Laine because of his shot, situation and playmakers around him could be a Generational GOAL SCORER but that's about it. I can't see many other candidates becoming that. Mackinnon has already started off to bad, unless he repeats his production of last year every year for the next 15 years or so then he would be in the conversation.
It's an overused term and quite frankly everyone has a different definition.
(Don't really want to go earlier then around the 50's)
Guys who could be views as.
Richard/Howe
Sawchuk (Plante/Dryden)
Beliveau
Orr/Dryden/Hull/Esposito/Lafelur
Harvey/Bossy
Bourque/Macinnis
Gretzky/Messier
Lemieux/Francis
Hasek/Roy/Brodeur
Niedermayer (HM Pronger)
Lafontaine and Neely had potential until injuries, like Bure and Lindros though the latter two would make a better argument.
Lidstrom/Yzerman/Sakic/Forsberg
Jagr- Shout out to Kariya and Selanne but no on the term Generational..
(Too Many great players y from 1996-2004 that didn't last long or great/elite enough like Naslund, Iginla, Thonrton to be generational IMO so no to them as well.)
Ovechkin
Malkin
Stamkos was looking like one, not sure if that holds up.
Bergeron's resume is impressive but not sure about Generational. Barkov could be like this one day.
McDavid/Karlsson/Doughty? (Shout out to Pat Kane/Hedman but no)
WIth Possibilities to young guys like Barzal, Matthews, Laine, Eichel (three of these four names have only played one complete season it's too early to tell.)
Dahlin, Hughes, look like they have potential, and who's this NEXT one that's coming in 2020, or is it 2021 Savoie? I think I may of spelled his name wrong. But yeah.
I'm missing names, and some shouldn't be there but I Ztried my best for off the top of my head in like ten minutes.
The true Generational Players Without a DOubt
Howe (Richard/Beliveau?)
Orr
Lafleur (Harvey?)
Gretzky (Messier?)
Lemieux
Crosby (Malkin?)
Hasek (Roy and Brodeur?)
Jagr
Ovechkin
Lidstrom (Yzerman, Sakic/Forsberg?)
McDavid WILL be barring career ending injury (Maybe Karlsson)
Sav (If he's as good as they say for the future)