Chris Benoit was, and still is, one of my favorites of all time. The few times I met him he was always gratious and humble to his fans, cause he knew they made him. I'm not passing judgement over his life, because we may never truly find out what really happened over that heartbreaking weekend (who's to say Nancy didn't kill Daniel then Chris flipped? And how come Chavo was the last person to see Benoit AND Eddie alive? Conspiracies, begin!)
However, if Benoit would have kept on, there's only two scenarios I can think of. One, he would have continued on as the player-coach of ECW, having fantastic matches with CM Punk, Morrison, Elijah Burke, etc. up until being drafted. After that point, he'd continue having fantastic matches up until now.
Two, he'd be dead. Benoit did have a tendency to go WILD in matches he knows are good, and we he does that, he gets hurt (TLC 3 and the bump that killed his neck, landing head/neck first on that table dive against Booker, etc). Benoit's style when he brought it put himself more at risk than his opponent, and it was only a matter of time before he was dead or, like his hero Dynamite, crippled.
Now, could Benoit have joined TNA and bypassed everything? (Remember, his contract was up in 2006, but he resigned with Vince). Maybe, but we'll never know. The match-ups there certainly would have captured the audiences imagination and maybe, just maybe, TNA would be at a better point than it is today.
However, without the Benoit tragedy, Chris Jericho would not have come out of pseudo-retirement. I still feel Jericho didn't come back fully on his terms, but he saw the product--no--the audience needed him. He's the closest connection left to Benoit (hence why we have yet to be treated to an AWESOME Jericho DVD...his career and Benoit's went hand-in-hand) and seeing Jericho again almost made it OK that we lost one of the best. Had Benoit lived, we may not have gotten Jericho. It's an awful trade as far as the situation, but a good one in that we got back our Saviour (it's funny...traded one for another).
The Chris Benoit situation will always be a hard one for wrestling fans to digest, especially the aftermatch and decline of the business, but it's a situation we will all get over in time. WWE is slowly beginning to acknowledge him again (title histories, the write up in the new WWE Encyclopedia) and, over time, they may even say his name again. All I know is the business wasn't, and still isn't, the same since we lost the Canadian Crippler.