I translate your number into Latin, to be erudite.

I) Not with zoom. I don't know about scrool.

II) No. Boris is getting old and his eyes are deteriorating. I'm getting old, too, but not as fast. The pdfs look the same to me.

III) That's my primary interest, and I'm doing it, but annotation don't work in landscape mode. My workaround it to use repligo to annotate on the tablet side, then reopen the pdf on the e-ink side for reading. I'm dealing with one-page pdfs only, though; this won't be suitable for everyone. There are other reasons to download the beta, though; for example, if you like things to work a bit faster, or if you enjoy having your machine fail to come out of hibernation, necessitating a battery reset. Not everyone has been able to enjoy this last feature, though.