If Federer wins every GS match he will surpass:
Sampras (203)in Wimbledon this year
Lendl (222) in Australian Open 2011
Agassi (224) in French Open 2011 and
Connors (233) in US Open 2011
Records still coming
He doesn't even need to do that. He could 'just' get to the final of the remaining majors this year, and then to the quarters of all four next year. That'd equal Connors' 233 at the US Open in 2011.
Amazing that this longevity record is now almost a shoe-in!