Mark: You are bodging things together to get access to Netflix, but because it's not working it's the fault of the AppleTV ? :-)
Personally I'm not an Apple person anymore (got all 3 AppleTVs here in cupboards), but if you keep the whole Apple ecosystem then they run great, barely had an issue streaming from iTunes or from Apple for videos when I used them.
But using unblockus and an ATV should work just fine (got bunch of friends doing it with no issues), are you doing everything via Wifi ? Possibly poor signal (your Sony laptop will have much better antennas).
How am I bodging things together? All I'm trying to do is stream Netflix by plugging the device in according to accepted practice. I'm not blaming Apple TV for anything, merely trying to get it to work. I'll say it again, "In my experience Apple TV is not a good streaming device". I'm not anti-Apple, we have iphones and ipads in our house too.
I'm doing nothing via wifi, all is connected by ethernet.
All I want to know is why can I stream on the laptop and not the ATV?