Hello Imminsters!
Sadly, I have proven that a real life matrix/brain-in-a-vat scenario is impossible with the current paradigm of technology. A brain in the vat scenario, sold in a way similar to the Alcor Life Extension technology, would provide the central nervous system a way to survive much longer than the mortal body allows.
Using the classic Brain in the Vat scenario, and comparing this "blueprint" to current research, I was able to determine that such a technology could be feasibly built using common materials and recent advances in medical technologies. The main issues with the upkeep and maintenance of a brain vat are typically power consumption (to run heater, monitor, dialysis and artificial circulatory system components), and the fact that such a brain/vat technology would require a constant supply of oxygenated blood, recycled and filtered, as well as a constant supply of nutrients through intravenous delivery.
Currently, a company offers synthetic Plasma. This is an advancement, but one that is not adequate for a complete artificial circulatory system.
Cheers [glasses]
-h