but back to the original topic...
of course i prefer the look of a traditional tanto to a "tanto point" (which is never on tanto, but forms of it are occasionally on very old tachi),
but in certain pieces i don't mind the look straight look of the pre-nihonto chokutō style tip...
ie, when both edges are almost dead straight (as in chokutō

, or when both are curved slightly (as in very
old tachi), either with a slight belly or a recurve...but not so into the look of a curved belly and straight tip edge.
as for utility, having both edges dead straight is sure quick to sharpen to consistant angles!
some informative and concise references from kashima~san...
types of kissaki (there is a note about why even kamasu-kissaki on early tachi are very rare):
http://www.ksky.ne.jp/~sumie99/kissaki.html
more info on that process here, largely due to wear and repair (scroll down a bit):
http://www.ksky.ne.jp/~sumie99/wornshape.html
focuses on kissaki-moroha-zukuri but briefly covers the origin of the sword in Japan and shows some chokuto style blades:
http://www.ksky.ne.jp/~sumie99/kissakimoroha.html