Very often these days we want to stream video rather than audio, and that's perhaps where there's the biggest contrast between the capabilities of modern devices and those of the old Helios.Diminutive boxes such as the Roku and Apple TV not only pack in a lot more power than older kit, but they're much more upgradeable. Not just reliant on new firmware from time to time, the ability to add extra apps means that these can give you an excess - even a surfeit - of content to choose from.Much of the latest kit makes even Arcam's miniBlink look portly. Google's ChromeCast, Roku's Streaming Stick and Amazon's Fire Stick all just plug into a spare HDMI port, cost less than £50, and provide access to a huge amount of streaming media - though these days, the emphasis is far more on remote media via the internet than on content from a home server. UK readers will also have to wait a little longer for the Fire stick, though they can pick up the Fire TV box.To a degree, which of these is right for you may depend on which ecosystem you've bought into. If, for example, you're a big Tesco shopper and a fan of Blinkbox, then you may be best off with a Chromecast, as there's no Roku app for that service. And Amazon fans will, very likely, prefer that firms box or stick - which does at least also have Netflix as an option.

Product round-up First it was slimline Ultrabooks, then it was convertibles. Now the latest high-tech morsel that PC manufacturers are dangling before us in an attempt to boost their flagging sales is the high-DPI laptop.The information that Microsoft provides for developers refers to high-DPI displays as having a resolution of more than 120dpi, but in general use the term often tends to refer to displays that go beyond the 1920x1080 resolution of a conventional HD display.Apple – surprise, surprise – would probably claim to have pioneered this category with the Retina Display of its MacBook Pro models back 2012. But while Apple’s Retina displays still max out at 2880x1800 resolution, its Windows rivals have taken the lead and gone romping ahead – a trend that recently brought us Toshiba’s P50T-B laptop, which provides a 15.6-inch display with full 4K resolution of 3840x2160.Of course, for most people that sort of display is an unnecessary luxury – unless you’re planning to build yourself a really big spreadsheet, or want to watch House of Cards in 4K on Netflix. There are genuine applications for High-DPI displays, of course, including high-def photo- and video-editing, but for most of us a 4K display is really just eye-candy for its own sake.

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