I sincerely hope there will NOT be a license fee for 'owning a PC capable of streaming live BBC TV' as the current TV license is enforced for 'equipment capable of receiving live TV'. That would be like asking every motorist to pay the M6 toll because he owns a car 'capable of being driven on the M6 toll road'. Surely the BBC can see that not everyone that owns an internet capable PC is out to avoid paying a license fee (can't they?).
On the other hand if BT could get my internet speed high enough to actually stream live video I might consider the fine a worthwhile investment!!!