Currently if you have an object open using View(), you have to use View() again to see an updated/current version. It would be great if there were a toolbar button next to "Filter" to update/refresh. Additionally a keyboard shortcut for this would be great.
.Last.value is special -- it's not a real variable, just something you can peek at to see the value of the last expression. The auto-refresh feature works by watching variables for changes.
You can always end your statements with %>% View() to see the result!