I just can't see the NGP working. And I'm not a harbinger of doom, but LL's business practices never cease to baffle me.
For a start, SL has never produced a clear vision of what it's meant to be, other than 'Your world, your imagination'. Clearly, that can be interpreted in myriad ways. When it comes to enforcing 'the law', though, LL has always, weirdly, come down in favour of one side. Namely, the older users who want to manage a virtual holiday home and dress up their dollies, rather than push the platform's physics to the limit.
For people immersed in the game, it's worth pointing out: SL means next to nothing to the majority of the world's population. This is an extremely fringe platform; I'm sure that some whacked-out conspiracy forums get more genuine traffic. In a way, LL's decisions have killed off a lot of the potential for immersionism, to its detriment. SL or Sansar or whatever will never compete with FB; it's an entirely different dynamic. LL seem to have disregarded its ideal, target market with a series of dim decisions and futile attempts to 'be' something it can't.
'Sansar', IMO, is ultimately a forgettable name. Won't register or strike a chord with most folk.
You won't be able to transfer most (or any) of your inventory; retaining AV names is still a moot point (I still haven't seen any clarification on the issue of names); it seems it will be a completely different beast altogether. I think SL as we know it will grind on for a while, but why on earth would a company looking to make profits invest in a dead horse? SL will probably become like Inworldz for a couple of years and then fizzle out altogether.
As for Ebbe as an individual, I've yet to encounter a more wooden, dry and evasive public face for any company. His distinct lack of enthusiasm alone makes me wonder why he's been appointed to take forward a platform that's supposedly meant to stoke personal creativity.
Part of SL's amazing, initial dynamic WAS that clash of cultures and user intent. To have a grid that hosted educators, Gorean women on dog leads, genius scripters and redneck C&W DJs alike. It created an interesting frisson, at least. LL has now weighed in on the side of a vague 'nothingness', some undefined 'typical' user who doesn't exist, and has ignored/ deterred a lot of the dedicated obsessives and geeks who made SL what it was - and who would (probably) have clung on to become core customers in the long run.
I really can't see Sansar attracting anyone other than current SL users. Likewise, I can't see SL still running by the end of the decade.