Allio All-in-One crams full media center PC into 42" HDTV
Allio'sconvergence HDTV crams a full media center PC and Blu-Ray besides into a 42-inch LCD capable of a full 1080p, thanks to an Intel processor 4GB of RAM and 1TB of on-board storage.
It starts at $1600, which isn't bad, but these convergence systems are always tricky buying decisions: sure, you get everything you need to start a home theater system out of the box with no additional set-up, but all that stuff crammed inside just makes it more likely that one component going off will take down the entire system. And when you're talking about buying a television, it all just gets trickier: televisions are purchases people intend on keeping around for years or decades, but while the built-in PC might be convenient and beefy enough now, it is effectively stuck in amber forever... and that Intel processor, 4GBs of RAM and 1TB hard drive are going to start looking wimpy a long time before you're ready to upgrade your television.
Allio All-in-One [Product Page via Crunch]

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Here's a question that's been bugging me for a while: how do you figure out how wide something like this is? 42" is diagonal, but what is the width?
DevoPhill, do you mean the screen or the whole device including bezel? The screen you can figure out using the known aspect ratio of widescreens (should be 16:9) and the pythagorean theorem.
The screen should be around 36.6" wide.
The bezel is an unknown, though, so you'd have to look up the specs online to figure out how wide the whole machine is.