For the better part of a decade, banks with locations throughout the country have been arranging with nationwide title companies to send electronic documents to notaries, who would print them, bring them to the signers, and get the paper documents signed. The paper documents are sent back via FedEx or UPS. Is that what you mean?
We are beginning to see "hybrid signings" where the documents that need to be notarized are handled as above, but the unnotarized documents are being singed on a computer. Different platforms have different ways of doing this. It can be done on the signer's computer, or on a laptop provided by the notary. The notary may also need a hotspot on the notary's smartphone. Usually, an electronic pen is not required; either the signatures take the form of clicking boxes and typing the signer's name, or the signer uses the touchpad or mouse to draw a crude signature.
Also, there are plans to do digital notarizations. The notaries will need the same equipment as above, and also have to comply with whatever regulations exist in the notary's state. These would be in-person signings, with the notary and the signer in the same room; most states allow their notaries to do this.
Finally, there are remote digital notarizations, where the signer does it all on their own on their own computer, and for the notarizations, communicate with a notary using a webcam and microphone. Only a few states allow their notaries to do this, but most of the states are silent about whether a signer in their state can use the services of a remote notary in one of the states that allow their notaries to do it.