I own an Archos 5 IMT, which, although doesn't use e-ink, has a touchscreen. Recently, during my first flight with it, I noticed the screen had become completely unresponsive. I was forced to put it aside. The device was working properly the day before, and was back to normal again when I tried it again at the hotel. While not a sample size as large as yours, it's meaningful to me because my device has always worked properly with the exception of that flight.
There might be some component inside these gadgets that is either:
a) affected by the pre-flight scanners.
or
b) the in-flight instruments.
Exactly year ago, when HP released the Slate 500 (the predecessor to this Slate 2), there was a lot excitement among Tablet PC enthusiasts regarding the device. the device had been hinted by Ballmer at CES, then touted by HP, then mysteriously killed by the company, then suddenly resurrected by HP. Once released, the device sold out remarkably quick and became a source of frustration to those that awaited months for production to catch up with demand. It was obvious that HP had underestimated the Slate 500's appeal. The device got mostly good reviews from its owners. But at at treat point, HP had already shifted focus to the Touchpad, which got all attention, marketing and resources.
If you needed dual-boot capability, MS Office (or LibreOffice, like me!), Winamp, Notepad++, VirtualBox, Firefox and other Windows apps; and you happened to be into tablet computing; the Slate 500 offered you a platform to both consume media and do real work on the go....with all the amenities of laptops such USB, HDMI, SD Card slot, Bluetooth, etc. Truth be told, not cheap as a netbook, but you'd get a business-grade machine with decent durability, a docking station and a touchscreen.
Fast forward 12 months to this Slate 2. Intel convinced HP to "upgrade" (this word, plus "innovate" have truly lost their meaning) from the original Atom Z540 used on the Slate 500, to the slower Atom Z670. Not only is the CPU inside the "upgraded" Slate 2 quite slower, but its integrated graphics suffers from some crippling driver-induced sickness that prevents the GPU from even performing at the levels of the year-old Slate 500. Not only the new HP Slate 2 got beat by its predecessor from a year ago, but it also arrived too late, as Fujitsu released a slate of similar specs (the Q550) about 6 months ago.
I own 2 Tablet PCs (I'm handwriting this from one of them right now), but if you want to try this platform (this is not a toy), do yourself a favor and get a Tablet PC from someone else (the Samsung Series 7 Slate looks good). HP has lost its way.
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