Exactly, it's too vague.
It's reasonable to assume that BB wish this to remain a browser based game, logically that could be using Unity webplayer.
Or will we be moving to a client based system?
Not enough info.
Just hope they don't make the same mistakes King/Royal games did, started porting their games to HTML5 and suddenly they don't work on machines with 32bit browsers or Windoze.
Looks like the muppets did the work on a full 64bit system and didn't check for dependencies/compatability.
Basilisk did similar with the Linux versions of the Eschalon series, versions 2 and 3 asked for dlls not common on most stable versions, only the bleeding edge ones.