My friend Katie Carr sent me a link to this excellent article by Paul Duguid:
"Inheritance and loss? A Brief Survey of Google books"
Paul Duguid always has interesting things to say about books and the digital realm. In this instance he decided to check the quality of the Tristram Shandy editions available through Google books. The results of his investigation are pretty distressing -- never mind the special features of Sterne's book (the marbled page, the black page, and so on), Google books seems incapable of connecting a user with a legible copy of the text.
But I'll wait here while you follow the link and read the article for yourself.
Done?
I love Tristram Shandy because it demands the modern reader look at the original edition to be able to fully grasp the content. So I went to our shelf of Sterne in Fales and snapped some photos for your benefit:

First, here is the original marbled page from our copy of the first edition of Volume III, printed by R. and J. Dodsley in 1761:

If you really want to read up on the motley emblem of Sterne's work, check out this dissertation by Diana Alexandra Patterson: "The moral of the next marbled page" in Sterne's "Tristram Shandy" Without attempting to summarize her work, let me just point out here that every single copy of this page is a unique work of art. Marbled pages are like snowflakes -- no two are identical.
Right next to our first edition, Fales has a German translation published in Hamburg in 1774. Here's their translation of the marbled page:

That ain't marbled. It's pretty, but it ain't marbled.
Next on the shelf comes a Dublin edition of Sterne's works printed by P. Byrne in 1794.

That's where the marbled page should be, but they didn't even try.
Then there's another collected works -- this one printed in London in 1808:

This is an actual marbled page, but the style and color scheme are completely different from the original edition in 1761. Marbling techniques and styles change with the times, so it makes some sense that this marbled page has a completely different look.
These four examples are just the examples on our shelves in Fales. I did a quick search of the RLG Catalog (I'll post something about that another time) that turned up over 300 editions of Tristram Shandy published before 1900. Reprinting is another topic for the future -- it has become one of my favorite hobby horses in recent months.
But the basic point here is that even the best online edition of any work will leave something out. There will always be a need for places like Fales where one can sit down and look at the original artifacts of literary history.