Well, I have elucidated these points in several other threads, but here goes again, why someone would want this crap(vs n900 or iphone or android). And yes i will keep my n900 for sure and I have various other phones/mobile devices so it is not really a mutually exclusive decision for me at least, meaning just because I have/choose one phone I have to exclude all others, i am not marrying the damn thing like some of you people.

Where Symbian, and specifically this N8 device will suit my uses cases:

mobile entertainment usually from downloaded media, xvid etc(currently employing a samsung vibrant for this chore, TV out is a little flaky though and n8 will have much better qulaity to tv) but the screen on the vibrant is really good if not outputting to tv

sales work. I use my n900 when I am having to do more sysadmin type stuff than sales type stuff. but the maemo PIM is laughable compared to symbian. Symbian contacts are great, feature rich, very configurable, etc. currently using e72

Symbian 3 will also have support for caldav which I already use and will be great to use on mobile

Navigation. I currently have an e72 that is my road warrior device for ovi maps and battery life, but assuming the n8 battery life is decent enough it will replace this use case as well. neither the n900 or samsung are as good at this IMO.

games and kid stuff use case. right now have an iphone 3gs. some of the new games on n8, especially golf look awesome, but we will see if the silly kid game apps get near the level of iphone. probably keep the iphone for this use case for now.

mobile photography as an always with you camera. yes this is a no brainer