Sometimes I wish I could just use any laptop and Remote Desktop into my gaming rig which is awesome. Then I can have whatever form factor laptop I want, but the problem is I think the latency still sucks (maybe not?) on stuff like Parsec even locally.

The latency is acceptable. I host a remote gaming rig accessed through Parsec, the extra encoding/decoding latency is minimal. Distance has the largest effect, I found that over roughly 1,000 km my total latency is about 30 ms, perfectly playable for all but the most competitive FPS.

Nah locally is fine, if you have a good 6ghz coverage, but that means a hotspot in every second room