What do you think passports will look like in 20-30 years?

My guess is that the booklet passport will quickly become obsolete as more and more countries switch to electronic visas. Now that records of who has been granted a visa are kept in a computer that can be accessed at the checkpoint, there is no real need for paper visas or entry/exit stamps anymore, and as countries switch to electronic visas, passengers will no longer need passport booklets. I would say that by 2040, most countries will issue passports in card format only, with a special booklet available upon request for people traveling to the few remaining countries that still issue paper visas.

What do you all think?