If we are talking about an extra screen, then it may not be the big help for a new player who stares down at 8 cards he's never seen before, plus Village and Smithy. Because most people cannot keep 8 new cards in their memory. I really remember my first games of IRL Dominion and that I initially had big problems to remember what all the cards do, even though they were in front of me to read.
Maybe it's possible, in the normal view, to replace the card picture with the card text in the supply piles for some cards, maybe the ones marked as non-familiar. This way the important information for a new player (card text) is immediately and always in front of them. Once they know what Masquerade and Forge do, they can mark them as familiar, and now they see the picture (as it is now). They still have the name to connect them with the text they have learned. The skill to recognize a card upside down from the picture that is necessary in IRL is not needed in online play, so (as a first learning step) it can be replaced with the much more important text.
Of course, I have no idea how hard that is to implement.