well.. no.. you could just bung an external box on - and samsungs do on-site fixing (replacing the panel in question on mine in about 20 mins) so its not a big hassle if it did go wrong.. and do freeview boxes actually go wrong??
the big advantage is the integration - 1 remote to do it, you dont have a freeview box cluttering up your home, less cables, an extra input sitting on the telly.. it doesnt add much cost either (and you still get normal tv in case the digital is teh brok0r)..