Interesting article, interesting device, nice and shiny.
Like others here (particularly Jerry) cooking good pizza's is a passion of mine and I've been working at it for almost as long as Indian food. I've eaten pizza's all over the world in Italy, USA etc and I think I know what makes a good one and what doesn't.
I gave up making pizza's at home for the simple reason that to cook a thin crust pizza properly you need high heat (both top and bottom) far higher heat than you can achieve in your average domestic oven, which if you're lucky will get to about 250c or 500f. You need 700f minimum to cook the thin crust dough properly, anything lower than that and the base goes biscuity - no matter how good the base dough might be. High heat produces a crisp outside but chewy inside.
I looked at the telegraph article, interesting read, lots of fluff, smoke and mirrors - no heat output mentioned. I looked at the website, lots of fluff, sales material and shiny ovens - no heat output information. That information may well be there, at a cursory glance I haven't seen it and if it doesn't reach 700F, it aint gonna work. I just re-looked and he's saying you need 500F to cook a pizza, erm :

I did see a pizza oven (similar to the Chadwick one) recently that did reach 700F and it was a lot less - about GBP120 from memory.
This is weird in preview the pound sign shows but when posted shows up as a ?, I've changed it to GBP now.