You could just get an NTSC NES or Famicom and play the games in 60Hz legitimately? Most PAL games had no adjustments and run exactly right in 60Hz. Heck or just grab an NTSC Wii and get many of the games on Virtual Console in 60Hz legitimately.
That said, if I were Nintendo I would do a volume 2 of the NES Mini before moving on to the SNES. It could be in top-loader form to avoid confusion between the two. If they worked out a way to do a cheap Zapper on modern TVs (maybe just Wii Remote style), even if it upped the price, the crowds would go even more nuts than this time IMO.
Believe me, I've often considered going down that rabbit hole, even with regards to getting a Japanese Wii for its phenomenal VC library (though Windjammers - a big draw for me - and perhaps other games have been removed again in the last years unfortunately) but I always got cold feet thinking about the power situation where Europe needs 220 Volt and the US and Japan I believe less. Without some kind of step-down converter you'd fry the console, I always thought.
You'd also need a CRT TV for the optimal old school effect, which I don't have space for, or a Framemeister-like device I think to get the image quality the mini NES provides on a modern TV. Also, the ship has really sailed on getting anything retro by Nintendo for affordable prices, which is why I'm so glad that this thing exists. A top loader mini NES 2 would also be great.
funny how they correct it on this but not on virtual console where you're paying a premium per game compared to this
Indeed, that should have been corrected years ago on the Wii when people started complaining.
Though going by the quite ignorant production manager mentioned a few pages ago, I get a strong feeling most things Nintendo does in this area is simply the easiest thing they can do, which in terms of VC is just to stick to each region's own releases because of copyright and localisation differences etc., while in terms of the mini NES it might have been to simply copy the US games for some reason. The lengths that their (rabid?) fans would go through for any sort of authentic and collectible product also seems to be underestimated again and again by the upper management. Again, IF this production manager was indeed not playing dumb with regards to why the mini NES is a hot seller when the Wii (U) VC offers a similar (but not as good for us here in Europe) experience.