Gamers have lamented the death of the quality game manual for years, but it seems that the PlayStation Vita hopes to truly hammer that final nail in. It appears that Vita games will ship without manuals at all, instead keeping its rules and tutorials strictly digital.
The Vita version of Marvel vs. Capcom was the first to do this, confirming that it would use a digital manual. Inside Games then obtained some other Vita game early and found that it, too, lacked a physical booklet. This would indicate that's a standard practice.
Sounds good to me. Manuals have steadily grown less useful over time, and I find that in-game tutorials are far better at teaching players than an exterior list of directions. Manuals, who needs 'em?
Vita Games Ship Without Instruction Manuals [andriasang]