What is regular PEAT?
PEAT stands for Progressive Eagle Advanced Technique (previously ProTH's Eagle Advanced Technique). It is basically my evolution of the EAGLE filter seen in some emulators, though more often now things like SuperEAGLE or 2xSaI or hq3x are seen.
What is hand PEAT then?
Doing it by hand and allowing the rules to be bent. Even the best set of automated rules will run into areas where the output isn't what we'd hope for, and the rules for things like PEAT are really very simple to begin with. Doing it manually one can bend the rules or apply new ones that would be orders of magnitude trickier to do in a computer program.
Why bother with still images?
Because I like it. Enhancing (and I know even the use of that word inspires debate) old pixel imagery has long been an interest of mine, so I like doing it well and seeing the results. There have also been a very few cases where emulators allowed higher resolution imagery to be used in place of the original sprites--I hope things like this become more common eventually, and then perhaps stuff like this could actually be used.
Why fonts and logos?
I'm no artist, and spritework can get pretty complex. Have a professional artist design a character, a professional pixel artist find a way for it to work as a 32x32 16-color image, and likely it's a bit more nuanced than I feel I can do a great job working with. I have a bit of familiarity with letters and numbers, though, which makes deciding what shapes they were trying for a bit easier. Fonts (at least of the older generations) tend to be simply one color (other than the background), which simplifies things immensely. Logos are similar in that they usually use a lot of text, and are pretty great if you want to represent a game with a single image.