Intrigued by this since I tend to go the opposite direction. I prefer digital for the narrative books, but physical for rulebooks and TROS. I feel a little better toting around a physical book for gametime than an expensive device. .
I don't like reading from screen really, not if i do it for longer than 5-10 minutes at a time. I'll make exceptions for "really hard to find unless as ebook" but not happily (and admittedly it is handy while traveling).
The only book i need on table is the rulebook(s), and phone or tablet-PC takes less space. Plus checking errata is faster that way without needing to print everything.
I will make an exception for BattleMech Manual though. Since it will include errata'd rules and more or less everything i need in one package, it will be practical as a physical rulebook.
I just hope it won't be needing errata really...