Keep in mind that this can cause a problem if you are networking and sharing resources with other PC's.
Description of the Microsoft Computer Browser Service
The browser service maintains a list of the domain name or workgroup name the computer is in, and the protocol being used for each computer on the network segment being served by the computer running the browser service. On each network segment, a master browser is elected from the group of computers located on the segment that are running the browser service.
Technically, it has been theorized that you can disable this service on all PC's but one and that one will remain always the Master Browser. I am not sure I completely agree with that though. My understanding is there is more to the Browser service than just delegating.
Tablet PC Input Service
The impact of these services are really very small.
However, for a security reason, disabling the Remote Registry could be useful.
Quite honestly, I have yet to see any real world benchmarks that say tweaking 7 is needed in any way shape or form, other than for the sake of doing it.