At this point in time, the following links are well written on both vulnerabilities & their potential for manipulations.
Latest status & further developments from ISC as of JAN 8th
https://isc.sans.edu/forums/diary/Meltdown+and+Spectre+clearing+up+the+confusion/23197/
Excellent educational & detailed article — sectionalized by each chip major & major vendors … At this point in time, it is well written on both vulnerabilities & their potential for manipulations
Cloud impacts are more about multiple users being all exposed at once — as hackers could hit the lottery v. single users
The CPU catastrophe will hit hardest in the cloud
https://www.theverge.com/2018/1/4/16850120/meltdown-spectre-vulnerability-cloud-aws-google-cpu