Two hours ago, the Internet Archive opened up its first MS-DOS straight-in-browser emulation. For example, you can now check out Castles (https://archive.org/details/msdos_Castles_1991) that way. I used to play Arcade Volleyball (https://archive.org/details/msdos_Arcade_Volleyball_1987) with my friends.
Don't forget, this is on top of the already extant JSMESS emulation of over 600 systems. An example of that is Wordstar (https://archive.org/details/wordstar_2.26_osborne1_1981_micropro). I hope Microsoft Works 2.0 will come to the MS-DOS emulation, because I'm just not sure if I've got the actual program anymore myself, and if I do it's on a possibly deteriorating floppy disk.
This seems interesting for my nostalgia and my son's trouble with the DOSbox prompt.
I doubt it's very good for extended playing. While I think command-line skills are useful (perhaps slightly less in the outdated DOS sense), also see http://www.dosbox.com/wiki/DOSBoxFrontends
On their v2 the site is much more visually attractive.
(Of course, that doesn't just apply to MS-DOS games.)
Much better. My son didn't appreciate the other site (lol). Surely this will be more to his liking.
They've now added some old game called Karateka. (This probably means a lot if you lived in the '80s.) Including alpha/beta versions.