In both SHO and Genesis V8 case, you are getting a very comprehensive, high-end luxury feature set not a luxury car. The feature set is just a part of a luxury car IMO.
Other than luxury features, what else makes up for a luxury car?
Power, quietness, smoothness, ease of ingress / egress, space, comfort.
I would add materials quality (in/out), attention to finishing details (in/out), brand equity, buy/service experience, craftsmanship...
Warranty too? Usually "Luxury Brand" offer 4 years/80000-100000km bumper to bumper. Acura CSX, twin bro of Honda Civic, has 1year/20000km extra warranty.
If it is a Ford and a turbo charged engine, I would like to have the extra year/km warranty on it. Like some of us have said, if it is a Lincoin, no one would complain about the pricing. Sometimes a brand has too much burden after so many year in the industry, especially with reintroducing a well known icon?
By the way, good job for Ford to make the SHO (100 more HP and lb-ft) to have almost the same fuel consumption as regular AWD Taurus (thou it takes premium fuel). I just hope internal direct ejected engine with turbo would be a reliable engine choice, not just Ford, also for VW/Audi and others too. Hope the cost of maintenance of such an engine would not be significant higher than "tradition" engine. Anyone know what is Ford's ecoboost engine maintenance schedule? Require synthetic oil?