One interpretation is that the current investors, who are super-secret about Uber's finances, are getting out with a mega-profit and leaving Softbank holding the (empty) can. Apparently, Uber's paper valuation was dropped from $60billion to €50billion to make this deal happen. Softbank think they're getting it cheap but the current investors must be laughing all the way to their offshore banks!
At the end of the day, Uber is still losing something like $700million every 3 months, so a billion dollars cash won't last long.
As others have pointed out, Uber is just an idea - they don't own anything except a fancy computer program. Lyft, Google & even MyTaxi have rival computer programs. And as the Dublin drivers have illustrated, when they switch off the app, MyTaxi doesn't have a business!