The DMD is not the expensive part of the game to make.
I would say if you want to know what games are good candidates for remakes, take a look at the most expensive games and most popular on the list of top 100 games. Those are the ones that the market would bear the cost of a remake. For a remake to work there needs to hit this criteria:
At least N number of units that would be ordered, where N is is the breakeven point where bulk orders provide significant cost savings.
What determines whether games will reach 'N'?
The game should have a low number of existing games. The reason Taxi is more than half the cost of the DMD games isn't the tech or that the game is twice as deep. The reason is a lot more Taxis were made, and a lot more survived.
The game should be very popular with collectors, as they are the main audience. How popular a game is can be correlated to the pinside top 100 roughly. Now some games are total turds gameplay wise but would be very collectable like say Empire Strikes Back. But in general, games that have deep rulesets and are highly sought after on the collectors market (aka demand higher price).
The game should have a market value above reproduction cost. AKA if the game sells for $6000 on the collectors market, but can be remade at a profit for $4000 per unit, then it is a candidate for reproduction.
Does taxi really reach this criteria? Taxi is a great game, but unlike MM there are plenty out there to be had, and bang for the buck for $4K (your 'in theory' NIB price, which I think is highly suspect) you can get Whitewater, TOM, etc which have deeper rulesets and more things going on, and generally collectors like better. The biggest thing though, the game's market value is not above reproduction costs. People think that Stern and PPS are making a huge killing like 50% margin on a game but in reality my guess is pinball isn't lucrative, it makes some people ok money and they can make a living but I doubt they can churn out games for $3k a piece and charge $4k. Factories, labor, parts, marketing, support... all expensive.