> Meta/Alt
Meta and Alt are two separate modifiers, so if you get a JIS Japanese layout keyboard (QWERTY with extra modifiers), you can have Alt as a separate modifier, at least in X11, which has enough mod bits (mod1 through mod5) to cover everything. Handy for quick input of APL, Greek, etc. Unicode characters.
This is a common misunderstanding: a serious Emacs setup will use multiple modifiers (in my case, I need at least Shift, Control, Meta/Alt and Super, preferably also Hyper). My Mac's command key is mapped to Super in my native Emacs. My Emacs as an IDE is basically unusable without the Super modifier. As there is no way to get the additional modifiers through Blink, this is a non-starter. Additionally, the terminal is a bit too slow, and there are a number of other issues (for example, remapping CapsLock to Control kind of works, but there is a small delay, so you get missed keystrokes sometimes).
So, while I use and love Blink, it does not help with Emacs at all.