The two phones I'm looking at are the Samsung Note 7 and the Moto Z (not Force model).
1) The Note 7 is extremely expensive and now has a non-replaceable battery, so it is likely out of running regardless how cool the pen is (I had Note 1st gen and did some sketches with it you can see if you check my Steemit blog).
2) Moto Z feels nice and is crazy thin. About $200 less than the Samsung too. Its modular design allows magnetic snap-on modules like speakers, projector, battery pack. Battery looks useful esp, but it's open to developers, and that made me think that a snap-on Trezor back plate would be sweeeeet! If the industry can standardize the connectors and so forth, this might be the future of hardware wallets being born this year.
Any thoughts that might support or spike this idea?