The connection of formalism to specific technological particulars of a specific historical moment has killed it. (Greenbergian formalism is a dead end.)
Increasingly the conversion of smilies into cute little graphics by various software programs is looking juvenile, like an incorrect solution to what is clearly a problem based in punctuation. Consider the way that punctuation is essential to the creation of meaning in this singular statement:
Has your older computer equipment turned an ugly beige? (Assuming that it hasn't always been beige.) Then the Retr0Bright project might be for you. It's a way to de-discolor older plastics that have turned yellow from UV radiation. The results are impressive.
Thought Forms illustrations scanned and put on-line for your information. Besant's book may have been influential on early abstraction, especially both Kandinski and (possibly) Fischinger. Note the illustration that looks a lot like Fischinger's work.