Sadly this day won't come for two reasons:
Apple is pushing iCloud
Apple is focused on iPhone and iPad now because they are the money makers
I agree, streaming sucks especially in the US where the providers give you a paltry 2gb monthly limit for 30 like it's a deal. I am with T-Mobile and have unlimited data yet still use my iPod classic on a daily basis for music; I don't have to worry about reception or connectivity issues it just plays.