Legion tower with Ryzen 9 79503d and 5070 ti future proof question

Motherboard cannot be replaced so I am limited on upgrade ability here, however it’s on for an excellent price and I am considering returning my new laptop for this and saving about $800 CAD to use on a new monitor instead.

However, it is 850w power supply, so again, upgradablity limited. Technically it is possible to upgrade but if I’m limited to that power supply, not sure it would work well?

My question is - I want to get MORE than 5 years out of this (let’s say 7-10 years), right now I understand I can get ultra settings no problem at 1440p out of this. For 1440p, would you expect I get mid to high settings at good frames (at least 60) past 5 years out of 850w 5070 ti?

Thanks in advance, new to this