Would it bother you if the PS3 was Sony's last console?

[Willem]

Yes it would bother, cause that would mean that only MS and Nintendo remain.
We all know what happens when MS has no competition, they get lazy.

IE6 is a bitch for webdevelopers and designers, and if there wasn't any competition from standards-compliant browsers like firefox, safari, or chrome, they would have never make IE7 and IE8 more standards compliant.
That counts for Vista too: if there's no competion from Mac OS X and Linux, it would take years for them to start thinking about and work on a better OS like Windows 7.

Point is: if there isn't any competition, MicroSoft would go stale, just sitting back and relax and cashing money.
MS is undercutting the competition on price-level, they wouldn't do that if there wasn't any competition; you would have to pay the full-price for the console, the games, the online-business and the accessories.

The only mistake Sony made is making the hardware a bit to expensive for most people and took a bit too long with their games / software, but they didn't cut back on quality.
If Sony went out of business, it would be a loss for the gaming community worldwide: gamers and gamedevelopers