I would personally make it so that if you have the discs, you can play PS1 and PS2 games through emulation. If you buy them digitally, you get the upscaling to 1080p and trophies. If you've already bought the games, just redownload them as there aren't patch support for the classics or you can have an upgrade feature where you can pay a small fee to get the updated edition.
They will gain a lot of goodwill asset through this. But of course, that's like a fans dream. They will never do all of that when they can charge you for those same games again. Just the sad reality of this industry. Don't see them pulling a Microsoft this past E3.
Best wishes.