I know it's dual boot, but I also know a lot of people who just bought a cheep Touchpad to install Android, and never booted into webOS. Many never even gave it a chance, and hence are missing out on arguable a better tablet experience than ICS (it certainly has more tablet-optimized apps).

As for the webOS ecosystem dying, I'm willing to wait and see what happens with Open webOS later this year before I agree with you there. It's certainly in a lull with no new hardware on the way, but once Open webOS hits that issue is no longer relevant as I can install it on any existing hardware that supports Android.