Read some of the developer interviews that were done for almost every one of their conversions, which are all available at this site that I've linked below. Here's a sample for Galaxy Force II, one of their more challenging endeavors.
http://blogs.sega.com/2013/12/12/sega-3 ... eloper-m2/Not only are they interesting to look through, you'll get a lot more respect for this if you end up reviewing it. This is much more than a lazily done Genesis emulator with a handful of titles converted for 3D. Many of the games here in fact are actually arcade titles, converted for 16:9/60 FPS with a host of options.
While 3D Outrun sadly isn't in this retail volume and remains a digital exclusive on the 3DS here at home, here's an example of one of these widescreen conversions. Note the extra area to the left and right of the 4:3 image to adapt it for 16:9. No stretching or merely cropping the 4:3 image and zooming it in here. It's true 16:9 for a 1986 arcade classic.
3D Outrun in original 4:3...
3D Outrun in 16:9... 
And thanks to M2, this is one collection that I can say not only perfectly recreates the source material, it improves upon it.
Not only will you not find the arcade games on something like an AtGames portable, the 3D Classics release on the 3DS is often the first time that they've been done justice to at home in the West. And at least one game here, Thunder Blade, never saw anything released at home in Japan that remotely came close to the arcade original (Remember the awful Super Thunder Blade on the Genesis?).
And isn't it worth some points for being a physical collection of a good number of standalone digital downloads that I think cost folks $8 a pop? We all complain about digital downloads, yet we complain when they're bundled in retail form at a discounted price? Doesn't seem quite right...
And while I'm legally blind and can't see it for myself, the Super Scaler arcade conversions in Sega's 3D Classics lineup are reportably some of the best showcases of 3D on the platform. Thunder Blade, Power Drift, and Galaxy Force II in this collection all should be a treat to see for anyone that enjoys the stereoscopic 3D effect on this hardware (As would Outrun, Afterburner, and Space Harrier which all sadly remain digital exclusives for now).