Yeah, that’s the sort of stuff that (to my admittedly American-layman’s eye) seems to make the law as currently written actually somewhat nontrivial; and in the context of a lot of newer ‘not just a video file on some FTP server; but not really just cable shoved over IP’ offerings arguably somewhere between counterintuitive and downright unjust, were the resources and will present to actually enforce it as written).
So long as it was basically “You bought a TV, OK, pay up unless you double pinkie swear that you only use it for watching movie rentals”, a few edge cases didn’t really matter much. Now, though, it’s much more plausible to use a TV as a monitor, or for console gaming, exclusively; but it also seems arguable that a bunch of things wholly unrelated to the BBC, and not even really in the same business, might qualify as broadcast television that needs a license.
Maybe some of the resident UK-ites can provide more detail; but I’ve never heard of anyone being shaken down purely for owning a computer and accessing online video(live or on-demand); but that may just be because the number of people who own a computer but not a TV or DVT-B tuner card is small enough that it simply isn’t worth the cost of shaking them, or current policy is to avoid “London Man, 18, BBC Taxed for using Youtube!” headlines.
If I had to bet, I’d assume that the long-run trajectory would be for the notion that it is a ‘TV/radio license fee’ to be dropped, and team BBC to just be funded out of some ‘Arts/Culture’ budget in order to simplify the bookkeeping and avoid quibbling over edge cases; but who knows how long any such changes might take.
Back when TVs were actually relatively uncommon, and trivial reception of transmissions from just about anywhere technologically impractical, you could make a real case for a user-pays license fee arrangement; but given the plummeting cost of a functional TV(probably below zero, if you are willing to put up with a nasty CRT that would cost money to dispose of properly; ~$10 to add DVB-T to a remotely recent computer; pretty cheap for a new-but-lousy LCD TV) and the wide variety of non-BBC, often foreign, services, many arguably in no real competition with the BBC, it seems like the principled justification isn’t there and the headache of pretending that you are actually collecting on a user-pays basis probably costs more than it is worth.
Again, this is just my not-a-lawyer-your-lawyer-or-even-in-a-common-law-jurisdiction of the law, and my speculations based on reading occasional BBC and BBC-license based news. The UK is in UTC, so maybe somebody on lunch break can fill us in with an on-the-ground view.