I have a t490 with 500 nit display. 100% ARGB / SRGB. I haven't seen any macbook display that's sharp. Btw I have a personal 2012 Retina Macbook pro & a 2018 Macbook pro that I use for work for frontend.
The 2012 Retina displays are no less sharp than the best display on the T490. Are you sure you aren't just comparing macOS to Windows?
I'm the biggest critic of modern Apple notebooks there is, but I can't fault the quality of the MacBook Pro displays. They are, and have been for a long time, the best displays on notebooks.
How is the keyboard on the T490? I have a T460s at home where I like the keyboard a lot. I have a T470s at work, where the keyboard is a little less to my liking and I tried a colleagues T480s where it felt awesome again - so how about the T490? Can't really decide between T480s, T490, T490s or 6th gen X1 carbon.
The T490 does 100% Adobe RGB? I'm impressed. Seems like Lenovo has been really listening to people complain about the horrendous gamut ThinkPads have been afflicted with for some time.
