Being an endtime prophecy, how does Genesis 49:10 affect Christians since one side of it in ''Judah'' already has? In Genesis 49:1, sons of Jacob gathered at his request that he may tell them what would 'befall them' in ''the last days,''which I understand being peculiar as an endtimes' reference.

So when Jacob comes to Judah, in addition to other utterances, he pronounces a messianic blessing in the following verse; 


  Genesis 49:10
  The sceptre shall not depart from Judah, nor a lawgiver from between his feet, until Shiloh come; and unto him shall the gathering of the people be.


According to reformed theology, how does this particular verse bear upon believers in these endtimes? If at all.  

Because in Genesis 49:10, it clearly distinguishes 'Judah' as a 'lawgiver,'' which role also Psalm 60:7 &amp; Psalm 108 affirm, while 'Ephraim' is the strength of God's head. 


  Gilead is mine, and Manasseh is mine; Ephraim also is the strength of my head; Judah is my lawgiver;(Psalm 60:7)


To my understanding this isn't a casual comparison between Judah and Ephraim, since we as christians see the result of 'Judah' being a lawgiver among all the nations.  

Putting it differently, according to christianity, Jews have missed Messiah's birth, since a part of that prophecy has come true in ''Judah'', and that is, from Judah came one who is Messiah, a belief which is the life and the foundation of christianity. Yet that prophecy doesn't end with ''Judah,'' but with ''Shiloh,'' which latter in many places is associated with the northern kingdom in words like ''strength of my head'' in Psalm 60 and 108, but which northern kingdom ( Ephraim) is ''NOT a people,'' long before the coming of ''Judah,'' ref;Isaiah 7:8.
Could it be the same with christians, that while we point at Jews for their oversight, we have as well misunderstood this character of 'shiloh' in Genesis 49:10, who is portrayed in the above Psalms as being in the same honour as 'Judah' atleast as far as Judah's sceptre is concerned?
Jewish scholars admit that the meaning of the Masoretic Text in Genesis 49:10 is obscure.  In some interpretations "Shiloh" is understood to mean "shai loh" - "tribute to him".  This would be more consistent with the Septuagint, which is based on a Hebrew text centuries older than the Masoretic Text:


  A ruler shall not fail from Judah, nor a prince from his loins, until there come the things stored up for him; and he is the expectation of
  nations.


This verse could be interpreted to refer to the first coming of Christ, not the end times, since when Christ was born a ruler had, in fact, failed to come from Judah:  Herod's father was an Edomite who had converted to Judaism and was therefore not from the tribe of Judah.