you'll be able to have your own unique assets
This doesn't need a blockchain implementation, descriptions and names can already be changed by GMs who occasionally play an engraver ingame to facilitate that, I would like to see an autonomous(where a player can do it themselves) way to do such however although it should retain the base description/stats to make sure there's no swindling of players.
If you mean the shape of items in game then it gets a bit more complicated due to the implementation of it, since currently (and I may be very wrong on this so don't take my word as true) meshes and textures are stored client side meaning that if you were to have a single uniquely shaped item then everyone would need to have the file for it, which means that it will bloat quite quickly.
I also do not think that if we're talking about shapes that players should be free to be able create them without staff approval, since it's open to misuse. The same could be said about descriptions and or names of items but I think they are magnitudes apart in the severity of misuse potential.
for something tangible in both the real and the virtual world
I think the player base would be up in arms about this, one of the major upsides of PS is that it's free, completely free and there isn't even a premium option.
and new features become something eminently related to what the people of Yliakum want to manifest in the game(in terms of development and future versions).
Two points about this, again I fail to see why blockchains. A change in how features are developped/who may implement them is 'all' that would be needed.
Secondly I believe this should be avoided. If this were a game without a specific world setup and lore then I would perhaps agree that it should be more open but even then I would be hesitant to not have a committee or something to safeguard the game.
As it is, since this is a game with lore and a specific world it's in this has the potential to be totally destructive. Unless I misunderstand what you mean.
it would mean an autonomous world of possibilities, a final world of real virtual interaction. I believe that's the future to come.
For a generic roleplaying game I would agree that it's desirable and an interesting subject. However for Planeshift it's not necessarily(since most of these proposed features can be implemented without relying on blockchains) and would in effect cause it to cease and turn it to a more generic and loose setting due to a lack of guidance.
From a quick look most project seem to use it for the currency, to guarantee ownership of items(so they can be traded outside of the game?) or to generate stats for items, which can just as well be handled by the server
There are some good projects out there(chimaera for instance), real pioneers but no real open-source project.
Blockchain technology is taking the world by a storm.
Well, from what I can see it seems to be implemented either as a currency or as a magic marketing word, since blockchain technology is "taking the world by a storm" . I'm quite cynical I suppose.