thats the scenes problem. Time was you were used to 2CD releases and dealt with them as you needed to. So a <4GB file limit would have been simple to do,but they didn't. I'm surprised the advent of the PS3 with its relatively friendly MKV support (simple remux) might have meant more 4GB releases but it hasn't.
You can stream, but for me thats a pain for HD stuff. Luckily I buy blurays and only download TV for catchup so my filesizes are pretty low