It will slacken the head angle by about 1.5 degrees, the seat angle by about 1 degree and raise the BB by about .7 of an inch. This is all very approximate.
Apart from the concern around the extra leverage on the head tube the geometry changes will likely be noticeable but maybe not to the extent that its distinctly positive or negative. Most people would welcome the reduction in head angle because it makes the steering less sensitive to rider input so the bike feels more stable at speed but that will be countered to some degree by the higher BB and you may find you lose some pedalling efficiency with the slacker seat angle.
I ran a 1995 Yeti built for 100mm forks with a 130mm fork for about 8 months and loved the effect. Long term I don’t doubt I would have cracked something somewhere as a result but it would have been fun getting to that point.