Not really. If you're doing a multiplayer shooter, solving the lag problem is basic. Otherwise the thing is too annoying to play.
The question is whether you can come up with something more fun than a top-down multiplayer shooter. It's not like there's a shortage of those.
For some reason, the latest fad in indy browser games seems to be parking games. Truck parking. Tank parking. Airplane parking. Crane parking. Maneuvering large vehicles around, slowly. This is at least not warmed-over 1980s console gaming.
Here's a nice piece of work in WebGL.[1] It's quite good visually, but the gameplay is buggy. It also takes minutes to load.