I mostly just like it when bands/musicians I already have a favorable opinion of start dabbling in other genres I like, to see how their ideas translate to other mediums.
Niklas Sundin's Mitochondrial Sun is some fantastic shit imo, and Johan Reinholdz from Dark Tranquillity just recently put out his own instrumental electronic album. Anders Bjorler had Antikythera a while back, though that was a different genre.
I'm happy to see Anders try his hand at this kind of thing, and so far I quite like the results. But of course, since people have strong opinions about Anders, reaction to this new music will be accordingly strong, which is ironic because this is fairly typical of the style. And of course people are projecting more drama into the whole Halo Effect thing than there probably is.