seems to me congrats are in order

... see, that's what you guys get for teasing me with Maxi f-ing Lopez
relax, though - Borriello could be very useful signing for Juve. Itdidn't work out for him at Roma but last season they were a circus and this year he never got a chance between injuries and whatnot.
He was, however, one of Milan's most important players under Leonardo and played as a big-bodied target man but also on the left of a front 3, which is what Conte seems to be going for these days. He is very hard-working player, only needs to feel important for the team and appreciated by the coach, and runs his ass off for the entire game - often you'd see him go back and defend in midfield and even as deep as RB and LB positions.
And, just for the record, Milan wanted to keep Borriello and sell Huntelaar but it was him who wanted out once Ibra and Binho arrived as he feared he'd rot on the bench had he stayed.
Obviously he isn't a star name but is a more versatile forward than Matri - can score, provide physical presence but also use his pace and decent technique and creativity too - and can run a lot more than Vucinic, who is gased by 60th-70th min when playing on the left and simply doesn't have the legs for that role. My guess is, with Borriello on the left, Conte would try using Vucinic in the center as a more creative version of Matri now.
I reckon you will end up losing one of Borrielo, Matri, Quagliarella at the end of the season - would use the 2nd half to figure out who, I guess - and go for a star-striker in the summer for the CL ... so you can relax, for now