So, Grandma's appliance to replace her computer. Got it.

In fairness, throw a decent VNC client on there, hook up a keyboard and mouse, stop being annoyed by a little latency, and it may be a reasonable enough, though overpriced, thin client, allowing for you to actually get some work done, provided you've got a remote system or systems to be doing the real work on.

Which I guess is what you just said, except that a web app is to remote access what driving a bumper car is to driving cars.