The Bamboo Ink Smart pen has a very fragile BT button on the back. Broke it when I dropped it on my hardwood floor. I'd wait for a running change on the button design. Other than that, using 1 gram IAF on my VAIO Z Canvas and Surface Studio at MS Store was sublime.
Take a look at the IAF difference between the current Surface pen on the New Surface Pro demo unit at MS Store:
https://www.youtube.com/watch?v=BKzr_x6-d7M
As for tilt, I think we'll have to wait for the inevitable $100 version later.
So likely no tilt and no higher than 1024 pressure levels? (Otherwise they would've mentioned it)
I'd hate to sound like a broken record, but you can't tell the difference in amount of pressure levels after about 64/128. Our hand is not sensitive enough for such feat. We can only notice difference in IAF. and IAF is what everyone ALWAYS confuses as more or less pressure levels regarding pressure sensitive active pens.
Wacom likes to crank those pressure level quantity each generation to sell replacement tablets to existing customers. It's all nonsense.
Think about it this way: Imagine you have a stopwatch. It tells you time down to milliseconds. But the manufacture comes out with a new model that tells you down to nanoseconds. Would you see the benefit? No. You already have trouble physically pushing the button to stop the watch in consistent manner in tenths of seconds, let alone milli or nano seconds. You are not fast enough. And you can't perceive time in that level of granularity.
That's the same with active pen pressure levels in thousands. You can't possibly divide between 1 gram and 40 grams of pressure into thousands of levels by feel. You can't even do it in few hundreds. Or even high double digits Even if you had something huge instead of a tiny pen tip with your fingers to do it to, it would be impossible. Imagine you are pumping air into a tire using a bicycle pump with your arms. You have much more travel and pressure to play with than on an active pen tip. But would you be able to dial in between say dozen levels of pressure consistently with the pump? No. It's stupid nonsense.
Pressure level quantity increase is the biggest marketing scam in art tablets.
It's all about the IAF. It ALWAYS HAVE BEEN about the IAF.