7. Portable TVs
You used to see them in kitchens, in caravans and in kids' bedrooms: little screens, some of them with VCRs and some of them with DVDs. They're becoming an increasingly rare sight, though, with good reason: why drop good money on a portable TV when you can buy a more useful tablet for the same money, using on-demand streaming when you can get online and an SD card or USB stick when you can't? Portable DVD players are going the same way: unlike them, tablets don't skip when you go over bumps or lose entire video libraries to jammy fingers and scratches.
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8. Phone landlines
One of the last few reasons to use a landline - the ability to call freephone numbers without racking up insane call charges - is about to disappear. In the UK Ofcom has ruled that freephone should be free from *any* phone, and while the change won't happen until 2015 the publicity will start in 2014. You might still have a landline for your broadband, but you'll probably do all your communication on your mobile, tablet or computer.
9. Sat navs
The latest standalone sat navs are fantastic bits of kit, but they face the same "good enough" problem that's killing other stand-alone gadgets. The sat nav in your smartphone is almost certainly good enough to get you where you need to go, it's always up to date, and it's always with you - including when you get out of the car. If you're a million-miler then a dedicated sat nav is a sensible investment, but it's overkill if you only ever drive to the shops.
10. Curved TVs
We know what you're thinking: surely we can't be pronouncing curved TVs dead when they've only just been invented? Bear with us, though.
While curved screens make sense as monitors and in enormous cinemas, they're pretty useless in normal living rooms. They cost more, they're rubbish for wall mounting and they actually make viewing worse unless your whole family sits uncomfortably close to each other and to the screen.
The trend is manufacturer-driven, not consumer-led; it's something that makes sets stand out in showrooms and little else, and if it finds a mass market beyond exciting signage it's proof that marketing can sell us anything.