While it is true that Psalm 90 talks about those in the Wilderness, this chapter does not defend the notion that they went to Heaven, though. If you believe this chapter teaches as such, it would be a bit of a stretch of the imagination. For you would need to cite specific verses and cross reference them with other Scripture to prove that your case is true. But I know you can't do that. How so?
Well, Hebrews 3:7-19 gives us a clear warning from the bad example of those Jews who rebelled against God in the Wilderness.
For in the letter to the Hebrews, we see a need for steadfastness, or faithfulness, explains the exhortations found in this letter. We saw it in the first exhortation in Hebrews 2:1-4 with regard to "The Danger Of Drifting." And now we come to the second exhortation regarding "The Danger Of Departing From The Living God" in Hebrews 3:7-19.
This passage seems to follow three trains of thought:
"The Example Of Israel In The Wilderness" (vs. 7-11).
"The Danger Of Departing" (vs. 12-14).
"The Example Of Israel In The Wilderness" (vs. 15-19).
The first thing we need to understand about Israel in the wilderness is that Israel hardened their hearts. The quotation found in vs. 7-11 is from Psalm 95:7, 8, 9, 10, 11 where the Holy Spirit warned Israel not to be like their fathers in the wilderness. And the writer to the Hebrews found this warning to be just as necessary in his day.
In the wilderness, the Israelites hardened their hearts in rebelling against God. They tested (or tried) God with their lack of faith. And that is the reason they did not enter God's rest. God became angry with that generation in the wilderness because of their persistent rebellion (Psalm 106:13-33). And so in Numbers 14:22-24 and Numbers 26-35, God swore that they would not enter His rest. Of all those over the age of twenty when they left Egypt, only Joshua and Caleb entered the Promised Land. All the rest, of which there were 603,548 men, died in the wilderness. Because of their hardened hearts, Israel departed from God. They rebelled against God. And because of their rebellion, they fell short of the Canaan rest that had been promised to them.
The Danger of Departing (vs. 12-14).
Now, with this "Warning From The Wilderness" fresh in their minds, the writer next exhorts his brethren by warning them of "The Danger of Departing." And so, we need to BEWARE. You see, a believer can develop "an evil heart of unbelief." Back in v. 1, the recipients of this letter were called "holy brethren, partakers of the heavenly calling," which means that this warning against developing a heart of unbelief is presented as a real possibility! A "believer" can become an "unbeliever"! And unbelief is produced when you are "hardened through the deceitfulness of sin."
Sin is deceitful! It promises pleasure, power and prestige. And in the short term it may seem to deliver on that promise. But such things are "passing," or temporary. Later in Hebrews 11:25, the writer talks about why Moses left the luxury of the palace of Pharaoh and says, "choosing rather to suffer affliction with the people of God than to enjoy the passing pleasures of sin." John warns us in 1 John 2:17 not to love the world because "the world is passing away, and the lusts of it." The rewards of sin are "passing away." They are temporary. But because sin is deceitful, it is easy for us to become "hardened," to become stubborn and not willing to heed the Word of God. It happened to Israel, and it can happen to us! And the consequence of such unbelief is "departing from the living God." As you grow in unbelief, you drift away from God. While a believer remains in fellowship with God, an unbeliever can only depart farther and farther away from God.
Source Used:
http://www.bible.ca/ef/expository-hebrews-3-7-19.htm