Re: Invested?
"I would hazard at a guess that an Apple Toy (viz iPad) will be worth more after 2 years than the equivalen Android or Surface devices in terms of % value retention."
Maybe. But when the huge iPad profit margin that would have paid for two or three almost-as-good / better Android devices is taken into account, the iPad still amounts to a pretty large financial loss in comparison.
Unless, of course, a picture of a bitten apple is "worth" the large premium, as it clearly is to some types.