I'm looking forward to the movie, regardless.
'all form and no substance' makes me think someone was successful with Dick-ian interpretation!
To the point, I've been a Dick-Head since the late 60's, and although the man had some issues in real life and in his writing, this has been something he has pointed at in many novels.
If you read his stuff, he can spend a lot of time mapping it all out, but it can be like he realizes the rough draft has to be in the mail yesterday, and wraps it up in 10 minutes.
Still, it doesn't discount on his discourses concerning the nature of reality.
I won't go on (and on and on...) but his time spent on the 'nature of things' in a prime character's mind
point to a lot we might question ourselves.
Movie-use of his novels has been so-so, in my eyes, yet you can see most of the characters in 'Blade Runner' all question their own nature and reality. One might ask if Deckard thinks, or might realize if he is another replicant. In 'Total Recall' the main character it totally baffeled by who and what he is.
And on and on...
Don't get me started any more, unless you want some more...

Thanks for the viewpoints, folks! I'm looking forward to it!
Best Regards,
DeadFish