Bokeh is always big news, but it's got to be the right kind. And the 'bubble bokeh' of the new TTartisan flies in the face of the smooth and creamy bokeh that we all try so hard (and pay so much) to get.
Instead, it produces a 'soap bubble' effect, where bokeh balls (no, they are a thing) have hard, bright edges instead of creamy, soft outlines. It all depends on how you like your bokeh, and there's no doubt that soap bubble bokeh produces a very distinctive look. Here's an example from TTartisan:
