Said in the General Transfer Window thread, this was always going to happen. Maguire and Pickford are the only 2 England World Cup heroes not at teams the press deem worthy and sure enough, they're both linked with moves on the same day. The story stinks of rumour-mongering.
His stock couldn't be much higher at the moment - after a season where he was questioned in the media, he had a decent World Cup (Colombia and Sweden mainly) and obviously with England's run, his profile has skyrocketed. If we're ever going to fleece Chelsea (or whoever else - I can see Arsenal looking to replace Cech before long) for him, it'd be now.
The other encouraging thing is that Butland would probably be available as would Heaton (although 32 now) and Pope (injured perhaps seriously last night) from Burnley, all of whom would be decent replacements. I'm not big on goalkeepers, there are probably more but they were the ones off the top of my head.
Pickford was one of the few bright spots last season, so we should do what we can to hold on to him. If push comes to shove and he looks to leave, though, at least there are a few shreds of comfort if we act quickly enough.