If the swig is anything like the Wiiu, it'll always be cheaper to buy the physical copy of the game. I know if you wait 6 months or a year games get decently cheap on the psn store but nothing but tiny indie titles ever go on anything more than 15% off in theWii U virtual console. The fact that Lego City and other release titles are still $100 says it all.
Disappointing g they don't match the "must have" physical price for popular games like smash Brothers that might entice people to pick up the wiiU if only it were discounted as well, seeing as it is a dead console.