The tension between the unusualness of practical product use and the marketing materials in blissful denial of that reality resonates in an ironic age, which prides itself on an awareness of and disillusionment in over serious, over advertised consumer products.
And perhaps most importantly, the Snuggie is nearly free to produce, leaving the manufacturer with plenty of margin to finance incessant television advertising, forcing a previously unknown (or unconcrete) desire onto an unwitting public with the usual tricks of the trade.