It would've had repercussions for the other Beatles:
1. We'd have had no 'Long and Winding Road' documentary or concert in '83 and then no 'Return to Pepperland' tour and album in '87
2. Maybe Double Fantasy wouldn't have flopped so badly in 1980?
3. I bet Paul would never have gone on his Wings tour in 1984, probably would've been spooked by the danger.
Interesting..
While we probably wouldn't have the 'Long & Winding Road' documentary - I'm sure we might have had a shorter one made without the full involvement of the Beatles, cobbled out of whatever bits of footage the film-makers could get rights to. Wouldn't be as good though.
To be blunt, I suppose with John dead that would've put an end to the "Are you going to get back together?" questions - I mean, how can you seriously ask that to 3 surviving Beatles and not sound heartless?
It was awkward watching the interviews John did promoting his 1981-2 world tour, every damn question was "Are you going to get back together?". I did like his knowing wink at Michael Parkinson after talking about working on the documentary though..
Anyway, on 'Double Fantasy'.. Yeah the sympathy thing could have driven it higher.. but John's songs on that album were a little too 1-dimensional, he was stuck in that 'domestic bliss' mode without a thought for anything else. I liked Yoko's contributions though - with New Wave music, she finally found the right commercial setting for her kookiness.
Another thing to ponder was John's early enthusiasm for the Internet - he had a webpage in 1996(!)
Sure it was pretty basic to begin with, but he was really big on interaction with his fans early on. Wonder who would have lead this trend without him around?
As for Paul, I honestly think John's death could've done him in - I can imagine him not touring for quite some time and recording some pretty dark albums.