Bruce Willis has been considering taking Apple after he realised he’s not entitled to leave the thousands of dollars worth of music he’s bought from them to his daughters / Getty Images

The Hollywood hard man is angry that his daughters won't be able to inherit his digital music collection. It's a situation that's only going to get worse, warns Rhodri Marsden

My vinyl copy of Captain Beefheart's Trout Mask Replica is a treasured thing – all four unlistenable sides of it – and it's there in my will as part of the motley collection of recordings I've amassed over the years. If I get hit by a bus today, my friend Jenny will get it, but the fate of the gigabytes of music I've bought online isn't so clear. Weirdly, they're not mine to bequeath; under the terms of license I merely have them on some kind of permanent loan.

Of course, it's possible that Jenny will play fast and loose with copyright law and play some of those MP3s at my wake. But legally she's not supposed to. It's anyone's guess as to why Bruce Willis has been considering his own mortality and copyright law of late, but he's reported to be taking Apple to court to protest against this very issue: the fact that he's not entitled to leave the thousands of dollars worth of music he's bought from them to his four daughters.

While Apple, Google, Amazon et al extol the virtues of buying digital media over their physical equivalents (Say goodbye to the frustration of losing your music! Access it across multiple devices!), the resulting decline in popularity of the CD, the DVD and books has also meant a decline in consumer power. With those objects, a "first-sale doctrine" applies; once we've bought them the copyright-holder can't stop us doing whatever we like with them. Digital activists have argued that the same doctrine should apply to digital downloads, but the screeds of licensing conditions we agree to prior to purchase appear to overrule this centuries-old concept.

As a result, you get situations like the one in 2009 where Amazon, realising that it had sold improperly licensed copies of George Orwell's 1984, remotely wiped them from all Kindles. Online media vendors retain that kind of power; spurning the first-sale doctrine is an essential part of their business model. After all, "second-hand" files are indistinguishable from the originals, so their availability affects the market for those originals in a way that a tatty vinyl copy of Trout Mask Replica certainly doesn't.

Recently, an ingenious service called Redigi attempted to call the industry out on this by inventing a second-hand marketplace for files bought from iTunes. Predictably, EMI immediately sued; that court case is due next month.

Over the next few years we'll start thinking more about our "digital estates" and how to pass them on. A British company, Cirrus Digital Legacy Services, already offers options to bequeath many online accounts including social media – but iTunes is notably absent, and it's hard to see how copyright law would change that in our favour.

If the US Copyright Office gets its way, it's unlikely that Rumer, Scout, Tallulah and Mabel Willis will ever get their hands on the sweet sounds sitting on their dad's iPod. Which they're probably not that bothered about, but that's hardly the point.