Microsoft is Dead 19 years ago
I really don't get the hype about Ajax etc. This (and maybe the younger ones are lacking this knowledge) effect could be done since the mid 90s.
In those days, you eithr used a frameset with a hidden frame to get the update stuff from the server and put it into the browser via DOM access. Or, to stay with MS, you could use a hidden IFRAME.
Really no rocket science... so, the killer apps these days are small, simple and FAST desktop apps (whatever desktop people use). We will see...