Is it possible to combine true streaming with AEAD?
Yes there are such schemes.

However they aren't standardized by any means yet.
The schemes I'm talking about take part in CAESAR-competition.
If you wait ~1 week (hopefully) you'll see if any mode / cipher makes in in the second round.
This paper provides you with a good overview over the ciphers.
The four ciphers you need are:


ICEPOLE (Sponge based)
KETJE (Sponge based)
Keyak (Sponge based)
TriviA-ck (Streamcipher based)




This schemes can be used. But I'd strongly recommend against using them before CAESAR-competitions has further advanced (a few years?). Until then splitting a message stream into pieces with own tags + IVs seem to be the only method one can think of. To ease up IV management, one could use Message numbers as nonces.