Designing a carputer for a sedan. Now I was thinking of simply placing a 7" touchscreen in the dash and hoping that everyone would be able to see it.

However after reading about glare etc I decided that my best option would be to go for the Lilliput screen with the transflective stuff (expensive). So now I want to make sure that ppl in the back can see the screen well. Now suppose there are no physical objects blocking their view, in general would the ppl in the back seat be able to comfortably watch a movie on a 7inch screen on the dash?

Sorry if this is a broad question, but am I being realistic? Or would I be better of getting a the normal lilliput and a cheapo LCD for the back and experience glare?