Any idea whether it's actually a spectrum inside it, or a windows box done to look spectrummy

Actually with a little trawling i found the original article:

http://srimech.blogspot.com/2007/10/zx-spectrum-laptop.html

Yep, that's not a Spectrum.

There's a video on youtube of a real Speccy laptop put together by some Swedish dude.

It's equipped with an IDE interface and loads games off of a flash drive.

Is that the guy who did the playstation laptop and the xbox one?

chootastic, if you are thinking off Benjamin J Heckendorn, then the answer is no.

Here is that guys website

http://benheck.com/