I am concerned with marketing campaigns that end up becoming a PR disaster due "ridiculously over optimistic" promises.

A product that delivers its promises is respected much more than one that "promises the moon" but never actually delivers.

I think it would be better not to be marketing about 1000+ TPS and CfB seemed to agree that "even 100 TPS would be very good".

Bitcoin can only "theoretically" handle 7 TPS *now* so if Nxt is able to do more than 10x that I think it will be "good enough" for at least a year (and would still put it well in front of the competition).

On Visa speeds and marketing: If saying we have Visa speeds or 1000 tps is worrying people that it may lead to unfulfilled expectations then I think we don't have to compare Nxt to Visa in marketing.  Instead perhaps we should say near-real-time or near-instant transactions. Or just the fastest transaction times in cryptocurrency.
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Forging on low-cost computers with limited storage: those days may be numbered.  Leasing forging power will be where we want to shift marketing once it is implemented.

I hate to see the RaspberryPi left behind, but 512MB was tight to begin with.

There are tiny computers with 1G and 2G RAM, like the Cubies, Odroid, and some Android sticks.